All Exhaust Systems by Engine Model - Big Block Chevy 454 / 502, 7.4L / 8.2L Exhaust Systems


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100 Results (Viewing 1 - 20 of 100)
Cyclone 4.50" "BIG GUN" Below Platform System For GM Big Block
Your Price:
$5,899.99

Cyclone 4.50" "BIG GUN" Below Platform System For GM Big Block

620-32070

Cyclone 4.50" "BIG GUN" Below Platform System For GM Big Block - Fully Polished

Description: For those high horsepower supercharged engine applications that require an exhaust exit that's basically 12" lower than a standard Bravo application. These systems feature a 4.-1/2" external pipe with a 4" internal pipe. These systems produce almost non-existent restriction to exhaust flow through the double wall water jacketed transom tail section. These systems are referenced as dry tailpipe due to the fact exhaust flow never makes contact with the discharged water. These systems are VERY LOUD due to unrestricted exhaust flow. Additional transom sealing rings will need to be purchased separately When only the best will do Cyclone delivers Note: all Big Gun riser/tailpipes are custom built, this price is based on the system referenced above. Changes or modifications could cost more. A simple measurement guide is all that's needed to complete Allow 7-14 working days to build.

"Hurricane" Lite 23" Tall Stagger Engine CMI Flange
Your Price:
$6,999.99

"Hurricane" Lite 23" Tall Stagger Engine CMI Flange

620-33555

“Hurricane Lite" HP525 / 600 / 700 Swept Header with CMI Flange (Header Only, No Tailpipes) - 23" TALL version

Hardin Marine is proud to introduce our new Hurricane Lite Headers.Featuring the same quality design and sleek looks of their big tube counterparts, the Hurricane Lite Headers are designed to replace standard HP500, 600, and 700 Headers. The 100% 316L stainless steel headers are completely annealed and stress relieved prior to the show quality polishing to ensure maximum durability. The header and tailpipe share a double wall design and water transfer system that even allows the option of pre-heating the incoming sea water. The Hurricane Lite Headers are available with a standard Hardin Marine flange, or a CMI style flange, allowing the use of Hardin Marine or CMI style Tailpipes.

More original features are the V-Tex collector design and aerospace inspired multi-axis leakproof bolted tailpipe flange, no hose type clamps or rope seals are used here. Each header offers a welded water inlet tree as standard equipment, once again you won't find any failed rubber hoses here.These headers share the latest in exhaust technology to achieve maximum horsepower gains on even the highest horsepower engines. By incorporating long staggered length runners that also provide for generous tall valve cover clearance.

Cyclone Header System For GM Big Block Standard Dimension Bravo
Your Price:
$3,999.99

Cyclone Header System For GM LS Standard Bravo Tailpipes

620-32570

Cyclone Water Jacketed Header System For GM LS and Standard Dimension Bravo - Fully Polished

This new cyclone header system is designed specifically for GM LS engines. The tailpipes are set up for standard Bravo exit locations.

This Cyclone wet exhaust series header works perfectly on both stock and modified performance applications This header mixes engine cooling water with the exhaust near the end of the tailpipe That allows you to use a 4" rubber hose connection to attach your transom mounted exhaust tips This is the perfect replacement for your factory exhaust system Oil filter, shift control, ECU brackets, gaskets, and bolts included.

If you are one of thousands of performance boaters oseeking the power and styling from stainless steel tubular headers then you're looking at the leader in exhaust technology These "Cyclone" header systems share 100% 316L stainless steel construction. All appropriate flanges are laser cut and CNC machined for a perfect gasket seal. Each individual exhaust tube is bent to precise, exact tolerances every time. A computer designed fully welded water inlet manifold provides equal water distribution to each exhaust runner tube. While each set of headers goes through a 1900 degree annealing process that multiplies the durability factor of the header many times over while providing added protection against corrosion. But the heart of these systems lies in the ability to generate loads of additional power. By using CAD-5 Technology to develop a unique staggered tube runner length, these systems are capable of maximizing the broadest low end and midrange torque, all the while yielding incredible peak power gains. These systems are available in many configurations to fit every boaters needs. Rest assured when you lay down your hard earned money because the system comes complete with all necessary mounting bolts, gaskets, and shift and oil filter brackets making installation a snap. This kit includes one (1) O2 bung standard, if you need a 2nd O2 bung on your kit, see related parts below.

Additional Information:

GM V8 BB Exhaust Manifold System Set

Your Price:
$789.99

This Part has options, please click the button below to order.

Stock Mercury OEM Big Block Chevy 454/502 Cast Iron 4" Exhaust Manifold and Riser Kit - 807078T08

525-454

Mercruiser OEM V8 BBC 454/7.4L and 502/8.2L Exhaust Manifold and Riser Kit w/out Spacer

Qty Description OEM #
2 Exhaust Elbow 807988Q03
2 Exhaust Manifold Assy. (with  drain plug) 807078T08
2 Gasket-Elbow 27-863724 (2 Slot, Restricted) or 27-863726 (4 Slot, Full Flow), or 27-860321 (Block Off, For Closed Cooling)
2 Gasket-Manifold 27-46820
  • Direct OEM Manufactured Replacement for Mercruiser Big Block Chevy 454/502 Manifolds and Risers
  • Manifolds and 4" Risers Constructed from Cast Iron and painted with black corrosion resistant paint.
  • Replaces Mercruiser #807078T08 and 89011A8 Manifolds
  • Replaces Mercruiser #807988Q03, 807988A03 and 44354A3 Risers
GM V8 BB Exhaust Manifold System Set

Your Price:
$699.99

This Part has options, please click the button below to order.

Stock Mercury OEM Small Block Chevy 305 / 350 Cast Iron 4" Exhaust Manifold and Riser Kit - 860246A10

525-350

Mercruiser OEM V8 SBC 305/5.0L and 350/5.7L Exhaust Manifold and Riser Kit w/out Spacer

Qty Description OEM #
2 Exhaust Elbow 807988Q03
2 Exhaust Manifold Assy. (with  drain plug) 860246Q11
2 Gasket-Elbow 27-863724 (2 Slot, Restricted) or 27-863726 (4 Slot, Full Flow), or 27-860321 (Block Off, For Closed Cooling)
2 Gasket-Manifold 27-33395
  • Direct OEM Manufactured Replacement for Mercruiser Small Block Chevy 305/350 Manifolds and Risers
  • Manifolds and 4" Risers Constructed from Cast Iron and painted with black corrosion resistant paint.
  • Replaces Mercruiser #860246A10 and 860246Q11 Manifolds
  • Replaces Mercruiser #807988Q03, 807988A03 and 44354A3 Risers
GM V8 BB Exhaust Manifold System Set

Your Price:
$1,319.99

This Part has options, please click the button below to order.

Stock Mercury OEM Small Block Chevy 350 Dry Joint Cast Iron 4" Exhaust Manifold and Riser Kit - 865735A02

525-35014

Mercruiser OEM V8 SBC 350 Dry Joint Exhaust Manifold and 14 Degree Riser Kit w/out Spacer

Qty Description OEM #
2 Exhaust Elbow 864591T02 (14 Degree)
2 Exhaust Manifold Assy. (with  drain plug) 865735A02
2 Gasket-Elbow (2 Slot, Restricted) or (4 Slot, Full Flow), or (Block Off, For Closed Cooling)
2 Gasket-Manifold 27-33395
  • Direct OEM Manufactured Replacement for Mercruiser Small Block Chevy 350 Dry Joint Manifolds and Risers
  • Manifolds and 4" Risers Constructed from Cast Iron and painted with black corrosion resistant paint.
  • Replaces Mercruiser #865735A02 and 864308T01 Manifolds
  • Replaces Mercruiser #864591T02 Risers
  • Fits 2002 and newer 350/377 engines with dry joint exhaust serial 0M317000 and up.
  • Fits 2004 and newer 305, 350 and 377 engines with dry joint exhaust serial 0W310000 and up.
GM V8 BB Exhaust Manifold System Set

Your Price:
$1,229.99

This Part has options, please click the button below to order.

Stock Mercury OEM Small Block Chevy 350 Dry Joint Cast Iron 4" Exhaust Manifold and 7 Degree Riser Kit - 865735A02

525-35007

Mercruiser OEM V8 SBC 350 Dry Joint Exhaust Manifold and 7 Degree Riser Kit w/out Spacer (2002- Early 2005)

Qty Description OEM #
2 Exhaust Elbow 864309T02 (7 Degree)
2 Exhaust Manifold Assy. (with  drain plug) 865735A02
2 Gasket-Elbow (2 Slot, Restricted) or (4 Slot, Full Flow), or (Block Off, For Closed Cooling)
2 Gasket-Manifold 27-33395
  • Direct OEM Manufactured Replacement for Mercruiser Small Block Chevy 350 Dry Joint Manifolds and Risers
  • Manifolds and 4" Risers Constructed from Cast Iron and painted with black corrosion resistant paint.
  • Replaces Mercruiser #865735A02 and 864308T01 Manifolds
  • Replaces Mercruiser #864591T02 Risers
  • Fits 2002 - Early 2005 systems with 7 Degree risers. Fits Serial Numbers 0M600000 - OW309999.
GM V8 BB Exhaust Manifold System Set

Your Price:
$1,245.99

This Part has options, please click the button below to order.

Stock Mercury OEM Big Block Chevy 454/502 Cast Iron 4" Exhaust Manifold, 3" Spacer and Riser Kit - 807078T08

525-4543

Mercruiser OEM V8 BBC 454/7.4L and 502/8.2L Exhaust Manifold and Riser Kit w/ 3" Spacer

Qty Description OEM #
2 Exhaust Elbow 807988Q03
2 Exhaust Manifold Assy. (with  drain plug) 807078T08
1 3" Spacer Kit with Elbow Gaskets 93320A13
2 Gasket-Manifold 27-46820
  • Direct OEM Manufactured Replacement for Mercruiser Big Block Chevy 454/502 Manifolds and Risers
  • Manifolds and 4" Risers Constructed from Cast Iron and painted with black corrosion resistant paint.
  • Replaces Mercruiser #807078T08 and 89011A8 Manifolds
  • Replaces Mercruiser #807988Q03, 807988A03 and 44354A3 Risers
GM V8 BB Exhaust Manifold System Set

Your Price:
$1,399.99

This Part has options, please click the button below to order.

Stock Mercury OEM Big Block Chevy 454/502 Cast Iron 4" Exhaust Manifold, 6" Spacer and Riser Kit - 807078T08

525-4546

Mercruiser OEM V8 BBC 454/7.4L and 502/8.2L Exhaust Manifold and Riser Kit w/ 6" Spacer

Qty Description OEM #
2 Exhaust Elbow 807988Q03
2 Exhaust Manifold Assy. (with  drain plug) 807078T08
1 6" Spacer Kit with Elbow Gaskets 93322A12
2 Gasket-Manifold 27-46820
  • Direct OEM Manufactured Replacement for Mercruiser Big Block Chevy 454/502 Manifolds and Risers
  • Manifolds and 4" Risers Constructed from Cast Iron and painted with black corrosion resistant paint.
  • Replaces Mercruiser #807078T08 and 89011A8 Manifolds
  • Replaces Mercruiser #807988Q03, 807988A03 and 44354A3 Risers
GM V8 BB Exhaust Manifold System Set

Your Price:
$1,099.99

This Part has options, please click the button below to order.

Stock Mercury OEM Small Block Chevy 305 / 350 Cast Iron 4" Exhaust Manifold, 3" Spacer and Riser Kit

525-3503

Mercruiser OEM V8 SBC 305/5.0L and 350/5.7L Exhaust Manifold and Riser Kit w/ 3 " Spacer

Qty Description OEM #
2 Exhaust Elbow 807988Q03
2 Exhaust Manifold Assy. (with  drain plug) 860246Q11
1 3" Spacer Kit with Elbow Gaskets 93320A13
2 Gasket-Manifold 27-33395
  • Direct OEM Manufactured Replacement for Mercruiser Small Block Chevy 305/350 Manifolds and Risers
  • Manifolds and 4" Risers Constructed from Cast Iron and painted with black corrosion resistant paint.
  • Replaces Mercruiser #860246A10 and 860246Q11 Manifolds
  • Replaces Mercruiser #807988Q03, 807988A03 and 44354A3 Risers
GM V8 BB Exhaust Manifold System Set

Your Price:
$1,279.99

This Part has options, please click the button below to order.

Stock Mercury OEM Small Block Chevy 305 / 350 Cast Iron 4" Exhaust Manifold, 6" Spacer and Riser Kit

525-3506

Mercruiser OEM V8 SBC 305/5.0L and 350/5.7L Exhaust Manifold and Riser Kit w/ 9 " Spacer

Qty Description OEM #
2 Exhaust Elbow 807988Q03
2 Exhaust Manifold Assy. (with  drain plug) 860246Q11
1 3" Spacer Kit with Elbow Gaskets 93322A12
2 Gasket-Manifold 27-33395
  • Direct OEM Manufactured Replacement for Mercruiser Small Block Chevy 305/350 Manifolds and Risers
  • Manifolds and 4" Risers Constructed from Cast Iron and painted with black corrosion resistant paint.
  • Replaces Mercruiser #860246A10 and 860246Q11 Manifolds
  • Replaces Mercruiser #807988Q03, 807988A03 and 44354A3 Risers
Seaward Series Big Block Chevy Exhaust System

Starting From:
$1,799.99
This Part has options, please click the button below to order.

Seaward Series "Bravo" Big Block Chevrolet Exhaust System

620-38035 + Option(s)

  • Manifold is powder-coated for corrosion protection
  • Optional "Ocean Series" Extreme Corrosion Treatment available for additional interior corrosion protection 
  • Perfect for use on OEM engines up to 415HP 
  • Polished Stainless steel tailpipe is manufactured from premium 316L Stainless steel, 4" OD 
  • 356T Aluminum Heat treated tubular style cast internal manifold core for header like performance
  • Silent choice, captains call, and select sound exhaust diverter system compatible
  • Kit includes all bolts and gaskets needed for installation
Seaward Series Big Block Chevy Exhaust System

Starting From:
$1,999.99
This Part has options, please click the button below to order.

Seaward Series "Bravo XL" Big Block Chevrolet Exhaust System

620-38038 + Option(s)

  • Manifold is powder-coated for corrosion protection
  • Optional "Ocean Series" Extreme Corrosion Treatment available for additional interior corrosion protection 
  • Perfect for use on performance OEM engines up to 450HP 
  • XL Riser for performance applications
  • Polished Stainless steel tailpipe is manufactured from premium 316L Stainless steel, 4" OD 
  • 356T Aluminum Heat treated tubular style cast internal manifold core for header like performance
  • Kit includes all bolts and gaskets needed for installation
Seaward Series Big Block Chevy Exhaust System

Starting From:
$2,599.99
This Part has options, please click the button below to order.

Seaward "Bravo HP" Series Big Block Chevrolet Exhaust System

620-38039 + Option(s)

  • Manifold is powder-coated for corrosion protection
  • Optional "Ocean Series" Extreme Corrosion Treatment available for additional interior corrosion protection 
  • Perfect for use on HP500, 540 Bulldog and other HP Bravo Applications.
  • HP Riser for high performance performance applications.
  • Polished Stainless steel tailpipe is manufactured from premium 316L Stainless steel, 4" OD 
  • 356T Aluminum Heat treated tubular style cast internal manifold core for header like performance
  • Kit includes all bolts and gaskets needed for installation
Seaward Series Big Block Chevy Exhaust System

Starting From:
$2,199.99
This Part has options, please click the button below to order.

Seaward Series "Bravo - 3" Taller" Big Block Chevrolet Exhaust System

620-38037 + Option(s)

  • Manifold is powder-coated for corrosion protection
  • Optional "Ocean Series" Extreme Corrosion Treatment available for additional interior corrosion protection 
  • Perfect for use on OEM engines up to 415HP 
  • 3" taller riser for tall riser applications
  • Polished Stainless steel tailpipe is manufactured from premium 316L Stainless steel, 4" OD 
  • 356T Aluminum Heat treated tubular style cast internal manifold core for header like performance
  • Silent choice, captains call, and select sound exhaust diverter system compatible
  • Kit includes all bolts and gaskets needed for installation
Seaward Series Big Block Chevy Exhaust System

Starting From:
$2,599.99
This Part has options, please click the button below to order.

Seaward Series "Bravo - 6" Taller" Big Block Chevrolet Exhaust System

620-38108 + Option(s)

  • Manifold is powder-coated for corrosion protection
  • Optional "Ocean Series" Extreme Corrosion Treatment available for additional interior corrosion protection 
  • Perfect for use on OEM engines up to 415HP 
  • 6" taller riser for tall riser applications
  • Polished Stainless steel tailpipe is manufactured from premium 316L Stainless steel, 4" OD 
  • 356T Aluminum Heat treated tubular style cast internal manifold core for header like performance
  • Silent choice, captains call, and select sound exhaust diverter system compatible
  • Kit includes all bolts and gaskets needed for installation
Seaward Series Big Block Chevy Exhaust System

Starting From:
$2,599.99
This Part has options, please click the button below to order.

Seaward Series "Low Port" Big Block Chevrolet Exhaust System

620-38105 + Option(s)

  • Manifold is powder-coated for corrosion protection
  • Optional "Ocean Series" Extreme Corrosion Treatment available for additional interior corrosion protection 
  • Perfect for use on performance OEM engines up to 450HP 
  • Low Port Riser for below platform or other low exit applications
  • Polished Stainless steel tailpipe is manufactured from premium 316L Stainless steel, 4" OD 
  • 356T Aluminum Heat treated tubular style cast internal manifold core for header like performance
  • Kit includes all bolts and gaskets needed for installation
Seaward Series Big Block Chevy Exhaust System

Starting From:
$2,599.99
This Part has options, please click the button below to order.

Seaward Series "Dry Tailpipe" For Stock Bravo Exit Location Big Block Chevy Exhaust System

620-38112 + Option(s)

Custom Measurements
Mercury Standard Exhaust Hole Locations

With the overwhelming success of the performance of Seaward exhaust manifold system it was only natural to expand into even more offerings. This latest version uses custom built dry tailpipes for a purpose built custom exhaust system.

Dry tailpipes refers to tailpipes that are water jacketed all the way towards the end of the tailpipe. This eliminates water mixing with the exhaust stream and causing "reversion" scenarios. This solid tailpipe design runs all the way through the transom and terminates approximately 5" outside the boats transom. A water discharge bung is provided in the top of the tailpipe inside of the transom and requires a separate water dump line and exit fitting. ***The line, fitting, and discharge fittings are sold separate.

These style of tailpipes require transom sealing rings that are again sold separately. Here is an example of what is commonly used 620-906700.

The Seaward exhaust systems will be the biggest market changing product to debut in 2016. These exhaust systems were not only created using the most modern robotic electronic machine operations but with state of the art tooling. What does all of this mean? It means you can now buy the very best reliable performance exhaust manifold system that money can buy for a whole lot less money.

Hardin looked at the exhaust market in the same fashion the worlds top manufacturers have in that through the most modern state of the art design and production efficiency we could build the best product and reduce the overall cost by hundreds of dollars over anything even remotely comparable in the world today

The SEAWARD debut is a 100% all new design these exhaust systems were built to provide virtually every feature once desired in a performance marine exhaust system with reliability and longevity being the key features.

Here's the facts: There is no other performance exhaust manifold system on the market today that with as many features and advancements in construction PERIOD. Starting with a 356T Heat treated tubular style cast internal core that has been optimized to flow with the technology design and shape and design of a tubular header. By extending the runners and separating the exhaust pulses to the collector this system produces maximum power in a compact design.

More Facts: 1000 hour salt spray coating. That's right this industry has never seen these types of processes. These products are extending the naval and aerospace program products as much as ten years. Sure the finish is that of a show piece, but it's truly what you can't see that sets these systems apart. Underneath the thick non-porous billet heat treated aluminum casing lies the most exceptional foundation of corrosion protection found anywhere. A hydrogen infused zinc process is applied to each manifold. Until now salt spray testing could merely only withstand 100-150 hours of sustained exposure, Today those numbers are 1000 hours of durability.

More facts: Tailpipes --- Not all are created equal --- Beauty is well beyond skin deep here as the beautifully polished stainless steel exhaust risers of the systems are manufactured from 316L Stainless Steel while inferior systems choose inferior stainless (303/304 Auto Grade) steel, Seaward systems offer nothing but the best money can buy which has been proven to be the most durable long lasting product for marine use.

The new Seaward System bears all of the superior quality's of their standard seaward system with the addition of a companion tailpipe allowing the connection of the factory tailpipe already in use. This is the perfect solution for engines equipped with silent choice or custom tailpipes as the user can still retain those. each kit comes complete with all necessary hardware for a complete installation.

FITS: Custom Big Block Chevy Dry Tailpipe applications.

NOTE: This system is ***STANDARD BRAVO EXIT LOCATION ONLY*** All others are built by quote only! Contact us for a quote.

***NOTE*** Modified engines often have different deck heights and raised exhaust ports with aftermarket cylinder heads. These tailpipes must be confirmed using this measurement sheet.

Seaward Series Big Block Chevy Exhaust System

Starting From:
$2,999.99
This Part has options, please click the button below to order.

Seaward "CMI Elbow Top Replacement" Series Big Block Chevrolet Exhaust System

620-38120 + Option(s)

With the overwhelming success of the performance of Seaward exhaust manifold system it was only natural to expand into even more offerings. This latest version uses the popular Seaward Ocean Series manifolds combined with a intersecting companion pipe allow for direct replacement of rotting, cracked, failing original elbow top styled headers while providing the unmatched durability of a performance manifold system. This system allow's the original tailpipes to be reused for simplicity and affordability of exhaust replacement.

  • Manifold is powder-coated for corrosion protection
  • Optional "Ocean Series" Extreme Corrosion Treatment available for additional interior corrosion protection 
  • HP Riser for high performance performance applications.
  • CMI Flange on riser uses existing tailpipes.
  • Also replaces Mercury HP 500 EFI applications. 
  • Polished Stainless steel tailpipe is manufactured from premium 316L Stainless steel, 4" OD 
  • 356T Aluminum Heat treated tubular style cast internal manifold core for header like performance
  • Kit includes all bolts and gaskets needed for installation
Cyclone "Shorty Header"
Your Price:
$2,999.99

Cyclone "Shorty Header"

620-32001

Cyclone "Shorty Header"
Replacement Header For Gil Marine, Mercury Hi-Performance & Rex Power Torque Manifolds
Fully Polished Finish

Do your performance manifolds look like these but your stainless steel tailpipes still look like jewelry?  This is a common problem with a number of aftermarket high performance exhaust manifolds, the solution is to replace them with the Cyclone "Shorty"! An all 316L stainless steel header designed as a direct bolt-on replacement for your cast aluminum manifolds. 

By retaining your existing stainless steel tailpipe or riser, you can remove your existing manifolds and simply slide the new "Shorty Header" into place and connect your existing tailpipes.  These units are currently available to replace Mercury Hi-Performance, Gil Marine, and Rex Marine Power Torque manifolds.  Each header is manufactured to the highest quality standard using 100% 316L stainless steel construction, laser machined flanges for a perfect gasket seal, and exhaust tubes that are B.T.B. bent to exact tolerances every time.  A fully welded computer designed water inlet manifold assures equal water flow to each individual exhaust tube.  These headers are completely annealed to maximize durability while preventing corrosion.  CAD-5 technology was used to develop the staggered length exhaust tube runners which provide for broader low and mid range torque, while yielding incredible peak power. This kit comes complete with all necessary bolts and gaskets to attach to your engine. Riser gaskets are not included, and you may need up to 4 gaskets depending on application. See related parts.

100 Results (Viewing 1 - 20 of 100)