Ecotec Exhaust & Airflow

Compare OEM, Ferrea, Supertech and BK Racing Ecotec exhaust valves by size, material, geometry and available flow-bench data. See what each manufacturer publishes, what the testing actually shows, and why...

Build a high-RPM Ecotec valvetrain as a complete system. Learn how valve springs, exhaust valves, lightweight retainers, solid lash and camshaft geometry work together for reliable valve control in racing...

Two Ecotec engines. Same cams. Same cylinder head. Same exhaust system. Different headers. One makes more power. The other doesn’t. Why? The answer lies in scavenging, exhaust velocity, collector design,...

Can a true long tube header fit a Chevrolet Cavalier or Pontiac Sunfire? The answer surprises many Ecotec enthusiasts. From engine mount positioning and tunnel clearance to thermostat housing modifications,...