GM Ecotec Exhaust & Airflow Tech | Headers & Manifolds | BK Racing

Check the head, valve dimensions and camshaft configuration before treating Ecotec intake valves as interchangeable.

On Oct 26, 2026 by BK Racing 0 comments

Compare exact intake valve specifications and evidence without treating unknown competitor details as facts.

On Oct 26, 2026 by BK Racing 0 comments

A practical record for professional HF35.6 head preparation and finished valvetrain measurements.

On Oct 26, 2026 by BK Racing 0 comments

Match HF35.6 valves, springs, retainers, lash adjusters and camshafts using measured operating requirements.

On Oct 26, 2026 by BK Racing 0 comments

How reduced-base-circle cams relate to intake valve tips, rocker contact and lash adjustment.

On Oct 26, 2026 by BK Racing 0 comments

Choose the HF35.6 tip configuration by camshaft base circle and finished valvetrain geometry.

On Oct 26, 2026 by BK Racing 0 comments

What a +0.5 mm intake valve changes geometrically, and why curtain area is not a CFM prediction.

On Oct 26, 2026 by BK Racing 0 comments

Ecotec Exhaust & Airflow