Cometic MLS Head Gasket for Porsche 996 & 997.1 turbo 103.6mm

What size are these?

The Cometic MLS Head Gasket for Porsche 996 & 997.1 turbo are for 103.6mm up to 105mm bore sizes and are also 0.027″ thick.  These are standard thickness and can also be used with O-ringed Liners and O-ringed heads.

What is MLX vs. MLS?

MLX is an upgraded version of the MLS.  It uses an internal O-ring style crush ring close to the inner bore of the gasket.  This raises the pressure on the gasket where it’s needed the most.  It’s not a replacement for o-ringing heads, but definitely an improvement over the standard MLS.   The reason they’re 0.040″ and up in thickness is to accomodate the extra o-ring and wrap around of the inner sealing surface which better protects the gasket at high power levels

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 and MLX Head gaskets.

If you’ve put in big head studs and overside pistons, 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?

Nope.  That’s not what these are for!   Upgrade to 3.9 or 4.1L so you can use our 103.6 piston cylinder upgrades and then you’ll want these bad boys.

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.