Cometic MLS Head Gasket for Porsche 996 & 997.1 turbo

What size are these?

The Cometic MLS Head Gasket for Porsche 996 & 997.1 turbo are for 100mm up to 102mm bore sizes.  Yes, the oem bore size is 100mm, but even the stock head gasket is 101.6mm.   We’ve followed this practice and run a slightly oversized bore on your gasket so you don’t burn the inside layer of the gasket causing premature failure.  We also have 102-103.6mm bore sizes available.

While these are 0.027″ thick like the oem head gasket, we also offer 0.040 and 0.045 MLX style gaskets to slightly lower the compression ratio in higher boost applications.

Why can’t I use OEM head gaskets?

If you’re building your engine for high power you want to use the best head gaskets available. Cometic has made a tremendous name in racing and high powered street engines with their MLS Head gaskets.

If you’ve put in big head studs, you’ll be needing these.  OEM head gaskets are about impossible to drill out and oversize.  Save shop time and excessive labor by purchasing the correct head gaskets for your build.

Can I use these on a stock engine without big head studs?

Absolutely!   Even with a stock engine build, these head gaskets are a nice upgrade for improved sealing over oem head gaskets.

how many do I need?

These are priced individually, so you’ll need 2 if you’re doing a full build, or only 1 if you’re doing a single bank repair.

Need help with your build?

Check out Protomotive Engine building and Protomotive consulting service.