I am looking to replace the exhaust on my 1985 Iroc 5.0. I have the 4 bolt flange cat and intermediate pipe set up. Any systems for this type of set up or any intermediate pipes with the 4 bolt flange. I am having trouble finding a pipe or kit that will work.

Thx

 

If you can't find one, could you chop the 4 bolt flange off your old exhaust, then chop and weld it to the front of your new "standard" aftermarket exhaust?

 

That's what I was thinking of doing. The pipe after the flange is oval in shape buy eventually goes to 2.75". I would need to seem it at the point it goes back to round.

 

Yep. Or if your aftermarket mid pipe is bigger (like 3"), you could cut the flange off that at the appropriate place, then slightly smash/ovalize it, then slip it over your 4 bolt flange cut off pipe and see where it matches the 4 bolt flange's pipe cross section and shape, cut and weld them together there.

 

The cat back kits used to offer the 4-bolt flange option, but I haven't seen one in quite a while. I think the suggestion of using your old flange and a little bit of the existing pipe and adapting it to the new intermediate pipe is the best option.

 

Thanks. May just use the current intermediate pipe for now. I had to cut it off at the muffler to get it off. So ordering these Tail Pipes

Then will get a muffler and a small piece for the inlet of the muffler to intermediate pipe.
Will be the cheapest option for now being that I am in the middle of restoring the car.
Any opinions on muffler ?
Was looking at the Dynomax Super Turbo
https://www.summitracing.com/parts/w...maro/year/1985

And the Magnaflow
https://www.summitracing.com/parts/m...maro/year/1985

Opinions ?

 

I have the Dynomax muffler (actually the entire exhaust system) no complaints. It has a nice sound IMO. Like the title says "turbo", the sound reminds me of the old generic "turbo" mufflers/dual exhaust that the local exhaust shop would put on before there was "name brand" besides Thrush Glass Packs from the 70s came on the scene.

 

Thanks, The Dynomax is definitely less expensive !

 

Muffler choice is personal preference and very subjective. Depends a lot on what you want. Dynomax is going to be closest to the original exhaust note, marginally louder. Magnaflow is louder than Dynomax, with a deeper tone. I had a Magnaflow on my car 20 years ago and liked it back then, but these days it would be louder than I would like. I guess I'm just getting old.