Chevy BBC 454 Oval Port LowRise Aluminum Intake Manifold [Polished] Speedmaster pinion depth shims allow

Speedmaster pinion depth shims allow you to seat your pinion gear perfectly

equal-distribution layout produces great midrange torque without compromising top-end power

Spacer can be reused if disassembly of the carrier is required

not from sand molds

Chevy BBC 454 Oval Port LowRise Aluminum Intake Manifold [Polished] Speedmaster pinion depth shims allowThe 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.