Mercury Marine Catalog - Cylinder Heads

2.5L / 3.0L Cylinder Head
Your Price:
$706.56

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

2.5L / 3.0L Cylinder Head

525-938-8M0115134

2.5L / 3.0L Cylinder Head

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • Heavy duty valve springs
  • Screw in rocker studs
  • Marine grade brass core plugs
  • Features Black-X Composite valves for 42% Longer Life

For: 1963-1989 MCM & GM 2.5L, 1968-1989 MCM & GM 3.0L, 2.5L GM


3.0L Cylinder Head
Your Price:
$706.56

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

3.0L Cylinder Head

525-938-8M0115135

3.0L Cylinder Head

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • Heavy duty valve springs
  • Screw in rocker studs
  • Marine grade brass core plugs
  • Features Black-X Composite valves for 42% Longer Life

For: 1990-2016 MCM 3.0L, 3.0LX & 3.0L MPI


357 Cylinder Head
Your Price:
$617.50

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

357 Cylinder Head

525-938-8M0115138

357 Cylinder Head

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • 8-bolt intake manifold pattern
  • Upgraded ports for higher airflow
  • Heavy duty valve springs - 5500 RPM Rev Limit with 0.520" lift
  • Screw in rocker studs
  • Marine grade brass core plugs
  • Features Black-X Composite valves for 42% Longer Life
    • 1.94" Intake
    • 1.50" Exhaust

For: 350 Bravo Quicksilver Crate Engines Carb & MPI, 357 Bravo Plus Series, 350 MPI Tow Sport Plus Series, 357-CT Circle Tank


383 Cylinder Head
Your Price:
$944.06

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

383 Cylinder Head

525-938-8M0115139

383 Cylinder Head

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • 8-bolt intake manifold pattern
  • Upgraded ports for higher airflow
  • Beehive valve springs - 6000 RPM Rev Limit with 0.555" lift
  • Screw in rocker studs
  • Marine grade brass core plugs
  • Features Black-X Composite valves for 42% Longer Life
    • 1.94" Intake
    • 1.50" Exhaust

For: 383 4V MCM/MIE Plus Series, 383-CT Circle Tank


385 Performance Tune Cylinder Head
Your Price:
$1,181.56

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

385 Performance Tune Cylinder Head

525-938-8M0115140

385 Performance Tune Cylinder Head

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • 8-bolt intake manifold pattern
  • Upgraded ports for higher airflow
  • Beehive valve springs - 6000 RPM Rev Limit with 0.555" lift
  • Screw in rocker studs
  • Marine grade brass core plugs
  • Performance Tune Valves - for up to 700 HP - Boosted Applications
    • 1.94" Intake - 24N with Chromium / Cobalt alloy seats
    • 1.50" Exhaust - Nickel Super-Alloy

For: 385 Performance Tuned Plus Series, 5.7 L31 Pressure Charged


4.3L Cylinder Head
Your Price:
$528.44

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

4.3L Cylinder Head

525-938-8M0115136

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • Heavy duty valve springs
  • Screw in rocker studs
  • Marine grade brass core plugs
  • Features Black-X Composite valves for 42% Longer Life

For: 2000-2015 MCM 4.3L & 4.3L MPI, 4.3L 4V Crate Engines, 4.3L 4V Plus Series, 2000-2015 4300 LU3


454 / 502 Cylinder Head
Your Price:
$1,537.81

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

454 / 502 Cylinder Head

525-938-8M0115141

454 / 502 Cylinder Head

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • Rectangular intake ports for 454 & 502 High Output applications
  • Big Block Gen V & VI use only - not for Mark IV
  • Heavy duty valve springs - 5500 RPM Rev Limit
  • 2.19" intake valve
  • Screw in rocker studs & push rod guides
  • Marine grade brass core plugs
  • Features Black-X Composite Valves for 42% Longer Life

For: 1992-2000 MCM 454 / 502 HO & MIE 454 Horizon


5.7L / 6.2L Cylinder Head
Your Price:
$564.06

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

5.7L / 6.2L Cylinder Head

525-938-8M0115137

5.7L / 6.2L Cylinder Head

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • Heavy duty valve springs - 5500 RPM Rev Limit with 0.520" lift
  • Screw in rocker studs
  • Marine grade brass core plugs
  • Features Black-X Composite valves for 42% Longer Life
    • 1.94" Intake
    • 1.50" Exhaust

For: 1996-2016 MCM/MIE 5.7L, 2000-2009 MCM/MIE 6.2L, 350 Quicksilver Crate Engines Carb & MPI, 357 Alpha & 383 MPI Plus Series, 1996-2002 5.7L L31 Gen 1e, 1996-2016 5.7L L31 Gen 1e


540 Cylinder Head - 2.19" Valves
Your Price:
$1,537.81

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

540 Cylinder Head - 2.19" Valves

525-938-8M0115142

540 Cylinder Head - 2.19" Valves

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • Rectangular intake ports
  • 540 Plus Series or Big Block Gen V & VI Boosted Applications
  • Not for Mark IV
  • Heavy duty valve springs - 5500 RPM Rev Limit
  • 2.19" intake valve
  • Screw in rocker studs & push rod guides
  • Marine grade brass core plugs
  • Features Black-X Composite Valves for 42% Longer Life

For: 540 Mag Bravo 4V Plus Series


540 Cylinder Head - 2.25" Intake Valve
Your Price:
$1,894.06

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

540 Cylinder Head - 2.25" Intake Valve

525-938-8M0115143

540 Cylinder Head - 2.25" Intake Valve

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • Rectangular intake ports
  • HP 500, 500 EFI, & 540 Bulldog Big Block Gen V & VI Boosted Applications
  • Not for Mark IV
  • HP 500, 500 EFI, & 540 Bulldog Big Block Gen V & VI Boosted Applications
  • 2.19" intake valve
  • Screw in rocker studs & push rod guides
  • Marine grade brass core plugs
  • Features Manley Severe Duty valves

For: HP 500 & 500 EFI, 540 MAG Crate Engines


8.1L Cylinder Head - Driver Side
Your Price:
$1,338.75

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

8.1L Cylinder Head - Driver Side

525-900-8M0091709

8.1L Cylinder Head - Driver Side

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • Heavy duty valve springs - 5200 RPM Rev Limit
  • Screw in rocker studs & push rod guides
  • Marine grade brass core plugs
  • Features Black-X Composite Valves for 42% Longer Life

For: 2000-2009 MCM 496 & 496 HD, 2000-2009 MIE 8.1S Horizon & 8.1S HO, 496 HO MPI Plus Series, 8.1L Horizon Plus Series, 8.1L L18


8.1L Cylinder Head - Passenger Side
Your Price:
$1,537.81

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

8.1L Cylinder Head - Passenger Side

525-900-8M0090760

8.1L Cylinder Head - Passenger Side

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • Heavy duty valve springs - 5200 RPM Rev Limit
  • Screw in rocker studs & push rod guides
  • Marine grade brass core plugs
  • Features Black-X Composite Valves for 42% Longer Life

For: 2000-2009 MCM 496 & 496 HD, 2000-2009 MIE 8.1S Horizon & 8.1S HO, 496 HO MPI Plus Series, 8.1L Horizon Plus Series, 8.1L L18


CYLINDER HEAD COM Mercruiser 900-880536A18
Your Price:
$2,684.57

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Complete Cylinder Head 900-880536A18

525-900-880536A18

Mercruiser Complete Cylinder Head  900-880536A18


CYL HEAD-COMPLETE Mercruiser 900-8M0061026
Your Price:
$1,144.13

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Complete Cylinder Head 900-8M0061026

525-900-8M0061026

Mercruiser Complete Cylinder Head 900-8M0061026



HEAD ASY-COMPLETE Mercruiser 900-880536A10
Your Price:
$2,921.66

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Complete Head Assembly 900-880536A10

525-900-880536A10

Complete Head Assembly 900-880536A10



CYL HEAD-BLACK Mercruiser 900-8M0070288
Your Price:
$2,222.33

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head (Black) 900-8M0070288

525-900-8M0070288

Mercruiser Cylinder Head (Black) 900-8M0070288



CYL HEAD-BLACK Mercruiser 900-8M0070289
Your Price:
$2,222.33

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head (Black) 900-8M0070289

525-900-8M0070289

Mercruiser Cylinder Head (Black) 900-8M0070289



CYL HEAD-PORT Mercruiser 900-8M8025141
Your Price:
$1,231.65

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head (Port) 900-8M8025141

525-900-8M8025141

Mercruiser Cylinder Head (Port) 900-8M8025141



CYL HEAD-STBD Mercruiser 900-8M8025142
Your Price:
$1,162.35

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head (Starboard) 900-8M8025142

525-900-8M8025142

Mercruiser Cylinder Head (Starboard) 900-8M8025142



CYLINDER HEAD Mercruiser 900-835430T03
Your Price:
$375.88

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

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head 900-835430T03

525-900-835430T03

Mercruiser Cylinder Head 900-835430T03