Ecotec L36 & supercharged V6 L67 Inlet Manifold Valley Gaskets GM Steel

Will these gaskets fit both L36 and L67 engines?

Yes, these Havoc Motorsports steel valley gaskets are designed to fit both the naturally aspirated L36 and supercharged L67 3.8L V6 Ecotec engines used in Holden Commodores.

Which Holden models do these gaskets suit?

These gaskets suit Holden Commodore VS, VT, VX, VY, and VU platforms equipped with Ecotec V6 engines.

Why are steel gaskets better than factory plastic ones?

Factory plastic gaskets are known to warp and degrade over time. Our Havoc Motorsports steel gaskets offer a superior solution, providing stronger sealing, better heat resistance, and long-term reliability.

Will these gaskets fix coolant and oil mixing issues?

Yes. These upgraded steel gaskets prevent the coolant and oil cross-contamination issues caused by worn or cracked OEM plastic gaskets.

Are these genuine GM parts?

No — these are Havoc Motorsports engineered gaskets, purpose-built to outperform GM’s original plastic designs. They are an aftermarket performance upgrade, not GM-manufactured.

Can I install them myself?

If you have mechanical experience, you can install them yourself. If not, professional installation is recommended to ensure proper fitment and sealing.

Are these gaskets reusable?

No — we recommend replacing them every time the intake manifold is removed for best sealing results.