Aluminum Block Slant Six Racing MLS Head Gasket, 3.45 Bore 0.040 Thick,225,198,170,Slant 6

Aluminum Block Slant 6 Head Gasket, Slant Six Multi Layer Steel 3.45 Bore 0.040 Thickness.  

This gasket was manufactured by using an original slant 6 aluminum block head gasket as a template.  This is a copy of that gasket but produced in multi layer steel.  This gasket is by far the best gasket we've found for the aluminum block.  It seals well and can be used for performance builds that the stock gasket would not hold up to.  If you are looking for the best available head gasket for an aluminum block slant six, this is it.  

This listing is for a MLS (Multi Layer Steel) head gasket for the Chrysler Slant 6 Engine. 3.45 Bore Size and .040 Thickness. 

This was designed to fit the Aluminum Block Slant 6 but also works great with the Iron block verified over 14.5:1 compression in race and street applications.   You cannot use an iron block head gasket on the aluminum block. 

These Multi Layer Steel Gaskets originally came from a group buy we did together at slantsix.org.  These gaskets are sourced by Gaskets to Go.  I have worked with John (from Gaskets to Go) on a few gasket projects over the past number of years.  John always does top quality work and we have had great luck with everything he has made for us. I sent John an original ALUMINUM BLOCK gasket to use as a pattern for the new gasket and made sure it would fit the aluminum block slant 6.  These are comparable to Cometic gaskets and manufacturing quality is top notch.  

I have personally verified that these gaskets works great on the Iron block in my 62 Valiant race car.  I am running nearly 14:1 compression and 6700 rpms and had no problems with the gasket and a number of other racers are running them as well.  They say even higher compression ratios should be ok and the gasket should work very well under boost conditions without O ringing the block. 

There are other racers on the slantsix.org site that have used the gasket on the aluminum block and verified that it works great there too.  

I also know of some that have re-used their gaskets. While this is not recommended, it has been done and has worked successfully.  They say surface finish is the key to getting a MLS gasket to seal so keep in mind that the surfaces will need to be almost perfectly smooth and flat. These gaskets are not cheap but work very well for extreme use or the aluminum block. 

An assembly note:  On certain year heads one of the rivets that hold the gasket together may interfere. The rivet simply needs to be removed prior to assembly.