im having a huge problem sealing my new headers to my 305tpi camaro. I put on a set of mr gasket and they blew through, I was looking at summit and idk what to go with, There are round port primarie headers with D port cyl heads, do I get the gaskets that are D port or what? also if anyone can get a link where I can buy them I would appreciate it, thanks

 

Did you clean up the mating surface of the cylinder head before you put the headers on? Try cleaning them up with a wire brush and 180g sandpaper. Also try copper gaskets.

About what shape gaskets to get, I would get what matches the port on the head.

 

trying to seal to different style ports is going to be very difficult. either way you go your going to be blocking a portion of one of the ports off. try making a custom gasket. use some paper if you can and draw a template of what you need.

 

I think its D port, What ever a stock 86 tpi 305 has. I might just go with aluminum gaskets.
I took off the old gasket to see if it burned or not. Well it did, The exhuast blew out the side on the two outter cyl ports. i tried using a gasket that i knew worked on my 350 but it just leaked more. that one had the metal covered by the high temp paper?

 

i JUST dealing with the same issue, blew out paper gaskets, and a set of d-port coppers, went and bought mr. gasket copper round port gaskets, and bam! no more leaks

 

i just bought a set of square port aluminum percy seal for good gaskets, I hope itworks if not Ill just send them back to summit saying they didnt work lol. how did it blow out the D port coppers? is it a Dport head?

 

its a d port head, round port headers. it ddnt blow it out, but it leaked, like it never sealed at all. round port gaskets work perfectly

 

damn, Well ill try the ones I got and see what im gonna do from there. Damn things are 35 bucks a pop

 

i got a set of mr. gaskets for 37 (for the pair) at o'reilly

 

i got the copper gaskets from autozone and one side leaked right away... im not sure why... the only thing i can think of is that i put it on backwards but i am 90% sure i didnt. felpro last for a good amount of time.