Chevy SBC 350 Downdraft EFI Stack Intake Manifold System Complete Polished They have injector bosses precisely

They have injector bosses precisely positioned and machined for excellent fuel spray patterns and maximum power

Our rear-ends have a reputation for being tough to handle the abuse of Circle Track

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

Their strong die-cast aluminum design ensures an excellent gasket seal and dissipates heat better than many other covers

The air flowing under the plenum provides a cooler charge for the incoming air with less heat transfer from the engine

Chevy SBC 350 Downdraft EFI Stack Intake Manifold System Complete Polished They have injector bosses precisely