Exhaust flange gasket?

[mazdatech78]

Im am about to install a ATR single shot on my T. The exhaust didnt come with a gasket for the 4 bolt flange at my test pipe. I contacted the Buick dealer and an aftermarket parts store. Both said that no gasket was listed. Its hard to believe that a flange like that one uses no gasket. Just wondering what you guys use at that flange. Thanks
James hondatech78@yahoo.com

 

[denn454]

thats because there isnt' a gasket

i put washers in the bottom 2 bolts, it lets out a lot of the condensation, and really lets the turbo whistle. i'm sure theres no advantage to that but i like the sound.

use tome high temp silicone if your worried about it.

 

[BlackBandit]

I don't run a gasket and I've never had a problem. (although I might try that washer thing....you know, to drain the condensatioin ) I think that the turbo is a bigger restriction in the exhaust so a gasket isn't really important there.

 

[kh440]

Only thing I've ever done is to scoth-brite both surfaces to make sure they are clean and relatively smooth and never had a problem.

 

[turbo2nr]

I have a stock exaust system, and have been a big fan of the washer theory for years. Just dial in the sound you want. I'm sure it helps back pressure. Take out washers when wife rides with me, silent, but deadly. At the track, I just remove the cat (it's empty anyway), and bolt the rear section of exaust back to the hanger. Easy to do.

 

[stickybones]

I make my own gaskets out of this stuff called polyimide. Bought a 2'x2' sheet (smallest size they have) from McMaster Carr. Not cheap, but I found it works great and the big sheet has allowed me to make numerous gaskets for exhaust flanges. On the McMaster Carr McMaster Carr website the 1/8" thick stuff is P/N 93015K62.

Ideally you shouldn't need or use a gasket. However, some flanges are warped or bent a wee bit and need some help sealing.

 

[turbo2nr]

very true. My THDP came with a bent/warped cat. flange.