Aftermarket exhaust, use stock gaskets???

[Dream240]

Originally Posted by TheSnail

It will fit, but there is one problem. The center hole of your stock exhaust is 2" diameter, for a 3in exh, you would have a .5" wall all around, which would not do anything but create turbulence. Though 60mm is = to 2.36", it wont mater. If you plan on Na all the way, then it should be good enough, but if you are going turbo, you have failed

The snail hit it. This is why you can't use the Nissan ones. Just go to a muffler shop, guarantee they have gaskets for you. I would rather get some that aren't modified and pay a little more then spend time trying to cut one bigger to fit and end up screwing it up.

[Wei240]

Originally Posted by Dream240

The snail hit it. This is why you can't use the Nissan ones. Just go to a muffler shop, guarantee they have gaskets for you. I would rather get some that aren't modified and pay a little more then spend time trying to cut one bigger to fit and end up screwing it up.

it won't matter if he has stock header and stock cat, it's still around 2.5 all around, so stock gaskets still would work fine even if his exhaust is larger than stock...

[allmotorKA]

Originally Posted by Dream240

The snail hit it. This is why you can't use the Nissan ones. Just go to a muffler shop, guarantee they have gaskets for you. I would rather get some that aren't modified and pay a little more then spend time trying to cut one bigger to fit and end up screwing it up.

All of the metal Nissan gaskets I got from the local stealership were 2-1/2"...but this was a few years back. Did they change to 2"?

[Dream240]

Hell I don't know. I replaced my entire exhaust setup and my High flow cat has flare flanges so I don't need gaskets. Once I pulled all that stuff off I've never looked back. sorry I can't help more.

Wait...(light bulb just flickered)....The connection from the header to CAT isn't being touched right? Just the connection from the "FAKE" cat to the cat-back pipe. That would mean a stock gasket WOULD work. duh...I just realized that....Of course a stock gasket would work, since the fake cat opening is not changing, the larger diameter piping starts at the exhaust so everything before it doesn't matter. So yeah, use the stock ones!!!

OMG I can't believe I didn't realize this before....damn all that coffee i drink...got me SO WIRED!!!

[Dream240]

wait...(bulb flickered again)....this would only apply to the one the mounts the new exhaust to the stock fake cat. The gasket for the two exhaust pipes mounting together will need to be cut out appropriately or get the right size from a muffler shop. sorry guys...

As far as the material, the Nissan ones are metal based gaskets, they looked like metal and everything but they're flexible like paper, good stuff. Most muffler shops should have this quality gasket in stock to fit what you need.