Chevy GM LS1 LS2 LS6 2x4-Barrel Dual Plane Fuel Injected Intake Manifold Satin but both factors can be

but both factors can be equally important in a race car

Additionally

Speedmaster CNC ported cylinder heads are machined on dedicated 5-axis CNC machines to ensure accuracy and better flow

They also offer the potential for improved fuel economy by making the engine more efficient

but it can be attached on the vehicle's chassis

Chevy GM LS1 LS2 LS6 2x4-Barrel Dual Plane Fuel Injected Intake Manifold Satin but both factors can beSpeedmaster LS dual 4 barrel, dual plane fuel injection intake manifolds allow the installation of dual throttle bodies on late model LS Series engines. The dual plane, equal distribution layout produces great midrange torque without compromising top end power.