I installed the MAC headers on my car late last summer. I was going to use the Fel Pro Gaskets (1406 I believe), but when I lined them up on the headers they didn't exactly match up. So me being impatient like I am, did something stupid and used the gaskets that came with the headers. Now I think I might have a leak and want to change the gaskets. So what are the best for the MAC's? Thanks.

 

I'm going with the factory GM metal gaskets, from what I've heard these work best witht the macs.

 

Just had mine installed today. Iused OEM GM metal gaskets, perfect fit and not one leak... my.02

 

Used GM gaskets on mine. Put them on about a year ago not 1 single problem or leak to date.

 

I used the MAC supplied paper gaskets with mine for like 4 years and had no problems. We took the MACs off and put them on a bud's car and when we did so used the GM factory gaskets and no problems there either.

 

Thanks guys. Maybe I'll check the Header to Y-pipe connection first, before I go threw all the hassle of changing header gaskets.