I've been eyeing it for MONTHS...



... and noticed the seller added a "Make Offer" button, so I offered him $425... which, honestly... I know it's worth more than that. but he took it.

Here's the bad part. It's 2.5"s diameter (assumed interior diameter).


I intend to use it on my 1987 Fiero SE/V6 5-Speed, which will have a 3.4 V6/60 in it. I already have the engine sitting in a plastic crate. It has mildly ported heads, port-matched intake runners, intake, and plenum. It will have the H272 cam w/ 1.52:1 roller rockers (brand new cam, just haven't installed it), and the hogged out exhaust manifolds along with a ceramic coated "performance" 2" Y-Pipe (the one the Fiero Store was selling years ago where they re-welded the "Y" for better flow), and I'm going to do the DAWG mod on the plenum... and will likely even ship the whole thing out to an extrude-hone vendor once I get the DAWG mod done... just for the sake of it.

All of that to say, obviously... that I think the exhaust is just too big. I used to remember how to do the math, and with everything being optimal, the ideal exhaust size came out to 2.25".


I'm still happy with my purchase, but wanted to know your guy's thoughts on this. Is this exhaust way too big? Will it hurt / affect performance, or should I see a performance increase over my Ocelot 2" aluminized NON-mandrel-bent exhaust that's on there already?

Note: I plan to fit a proper stainless catalytic converter in place of the straight-through bolt-on piece that it comes with.


Bonus Question: without a muffler... but WITH a correctly-sized catalytic converter... will the exhaust be absurdly loud and obnoxious? Last time I drove my Fiero (like, it was actually running, and not pushing it on a trailer) I was 24 years old. I'm almost 46 years old.

[This message has been edited by 82-T/A [At Work] (edited 02-22-2024).]

quote Originally posted by 82-T/A [At Work]: Alright... well... son of a ***** . I found West Coast Fieros. I had discounted that site years ago because there was a big disclaimer stating that they no longer made exhausts because there was a back-log, this and that. But I found this: It didn't stop me this time... I was able to go through the ENTIRE process... entered my credit card number, clicked submit... and it said order placed. So, either they had one left, or... they are no longer back-logged and they're making headers again. Man, I know this is not the best financial thing to do... but this is my baby... I mean, I actually have a baby (she's 15 now), but this is my non-familial baby. I've had my 87 Fiero since I was just a month shy of 18 years old. And I want it a certain way that it will bring back the fun I had when I was younger, but also give me a bit more power. I ordered the 304 Stainless Steel Shorty Headers set, along with the matching Stainless Steel Y-Pipe. I ordered it with 2.5" exhaust so it'll mate up perfectly with the 2.5" exhaust system I just bought. It'll be awesome whenever I eventually get this car out of storage... lol...

Nice! The Fiero store offers 2 seperate exhaust systems, full stainless steel (slightly different, more modern looking exhaust tips) and "aluminized steel" I think I've heard it called galvanized or something. I understand how you feel about your car, I'm actually 18 right now, owned my Fiero for 10 months (and 12,000km ), only thing keeping me from doing literally everything to it is money, but I have a seasonal job at a garage that pays quite well, so come springtime my Fiero will have many presents! Even so, this winter I've done a lot to my Fiero, engine bay is clean, shiny, painted, polished, etc. engine should make 10-15 more hp then last fall, interior is cleaner, all speakers are new, (and a 10" sub behind the dash), and I will have polished wheels and new tires come spring.

[This message has been edited by 1985 Fiero GT (edited 02-22-2024).]