There are BAD gaskets out there, any thing from ONE-STOP auto pretty much sucks, but people buy it because it cost 3 cents

I always stick with FEL-PRO, and if you have cheap *** warped pile of crap MAC headers like me - I use Earl's Header Seals, they are Aluminum with some type of polymer around each port... Earls are made by HOLLEY..
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°79Stang° • 351w, TRW Flat Tops, Comp Cam 270h,Edelbrock RPM Intake,
Holley 750 Duel Feed, MSD-6a, 2,500 stall,
Flowmasters, MaC shorties, B&M Shift Kit, Hurst Pro-Matic][,
DrAgLiTES on all four's
No Times yet - heads on the way