Do corvette ls1 manifolds fit on f-bodys?

**ahritchie** · 07-08-2008, 10:11 AM

Anyone know if ls1 corvette exhaust manifolds will fit my 99 Firehawk? (Previous owner welded the cats to longtube headers and now I'm getting the "low efficiency code" with the check engine light...won't pass NC emissions inspection now....and clearing the code doesn't help.

rapter34 · 07-08-2008, 10:40 AM

they should im pretty sure the manifold is the same on every LS1.

rapter34 · 07-08-2008, 10:43 AM

wait NM they don't have the EGR connection. So yes they will fit but they will not be emissions leagal.

**DIRTY JERZY** · 07-08-2008, 11:06 AM

There are 2 different manifolds for f bodys the vette ones wont fit

**Mr. Luos** · 07-08-2008, 11:18 AM

It will fit if you remove your EGR.

No gains to be had.

**DIRTY JERZY** · 07-08-2008, 11:33 AM

F body manifolds dump out to the back vette manifolds dump strait out the bottom

**Mr. Luos** · 07-08-2008, 11:36 AM

Shit...you are right.

I was thinking intake manifold, not exhaust.

rapter34 · 07-08-2008, 11:37 AM

ur right just saw that. im sure they would fit the bolts but not the rest of the piping. Also with the stock manifold u will need to have a stock y-pipe and cats.

**SandmanWs7** · 07-08-2008, 01:18 PM

I just took mine off for LT headers. Make me an offer and I will ship them to you.

**kool-aide** · 07-09-2008, 05:39 PM

not that this helps but i couldn't help to laugh. I asked the same question several days ago. I was bored and surfing ebay and came across C5 Z06 exhaust manifolds. I was wondering if they would fit because they looked way better than the stock 99 ones do. They eventually sold for something crazy like 40 bucks, lol...

they may not net you much but considering the cost. i thought it was a valid question.