Chevy BBC 454 Oval Port LowRise Aluminum Intake Manifold [Polished] Although the GM heads are

Although the GM heads are good pieces

Manufactured with lightweight aluminum technology

Pontiac Firebird

and use low-resistance terminals for maximum conductivity

These coils feature advanced bobbin technology

Chevy BBC 454 Oval Port LowRise Aluminum Intake Manifold [Polished] Although the GM heads areThe Speedmaster LowRise Manifolds are our lowest profile manifold and is also the only one that is street legal on pollution controlled vehicles. It is set up to accept a spread bore carb but comes with an adapter plate that permits the use of square bore carbs. To remain street legal with a square bore carb, you must use one that is also approved as street legal for your application.