Exhaust Ahead Gaskets

[doug16403]

Car: 73 Duster 340 stroked to 416 with TTI headers.
Today I installed new copper header gaskets replacing 2 year old aluminum gaskets that were leaking. When I finished I started the car and the exhaust leaks were worse that with the gaskets I replaced. I also used Stage 8 Locking Fasteners which I have heard nothing but good comments about them.

I'm looking for advice. What brand and type header gasket material does the best job?
Any advice, tips ya'll can give me would be greatly appreciated.

Thanks, Doug

 

[ScampMike]

Mr. Gasket Ultra-Seal Exhaust Gaskets 5935 - worked like a charm

 

[pishta]

copper expands when hot. How would they leak> are your flanges bent or something? Run them for a few mnutes and see if the leak subsides.

 

[71beater]

Never heard anything but good about both Percy's and Remflex.

 

[ChrisPerry]

Remflex...........never leak

 

[TrailBeast]

The best job of sealing and staying that way is Remflex.
You don't even need to retighten them.

 

[AJ/FormS]

I feel for you man...cuz
My cheapo Mr Gaskets have been on my 367-TTI-equipped,DD(summer only now), for something like 14 years.

 

[dduster73]

Definetly try Remflex