Chevy LS1 Billet Manifold/Cathedral Port (Carb) 

# 2571 – Chevy LS1 Billet Manifold/Cathedral Port (Carb) [71 Series] To increase performance through even distribution of air and fuel to each cylinder, The Blower Shop™ has developed its own intake manifolds for the LS Chevy applications. The Blower Shop's Manifold is a Billet 2 Piece design with an interchangeable Top Plate for either the 71 series or 250 Low Profile applications. All The Blower Shop's LS Bases (Cathedral or Rectangular) come machined with EFI ports for direct port injection. The Blower Shop's Standard (carb) NON EFI manifold includes #2577 EFI Block Off plates. This allows for easy conversion in the future if you ever decide to add Direct Port Injection. Includes: LS1 Billet Base Manifold Cathedral Ports #2578 – LS Billet Top Plate (71 Series) #2577 – EFI Block Off Plates #2589 – Pop-Off Plate with Springs #2590 – Aluminum Stud and Nut Kit #4900 – Base Gasket #4946 – LS Intake Ports O-ring Kit (8 pk) (10 ea.) – M6-1.00 x 65mm S.H.C.S. **Comes polished by default. Black hard anodizing is available at an extra charge but is not available through online orders. Please call us to place special orders.

• Weight: 35 lbs
• Dimensions: 22×15×7 in
• Port Billet Manifold: LS1 Cathedral Port Billet Manifold (2 Piece), LS3 Rectangle Port Billet Manifold (2 Piece)
• 71 / Low Profile: 71 Series
• Engine Model: LS 1/LS 3
• Fuel Delivery: Carb
• Carbureted / EFI: Carbureted, EFI (8 Machined Injector Ports)