joshua.lacy

I have a 2001 Firebird and I was wondering if anyone knows if it comes with a ls6 90mm manifold? I bought a fast 102mm but do I really need it if it has the ls6 manifold already on it.

ScottyBG

It should have shipped with an LS6 intake, but a 78mm TB, I believe is standard on those. It is definatly not a 90mm, those have 4 bolts, not 3 like yours should have. I wouldn't bother with a 102 unless you have heads and cam to go with it.

bww3588

iTrader: (49)

If you already have the 102, put it on. You will see a solid 25 HP gain now and it will leave you room to grow down the road

joshua.lacy

ok so would I actually be losing 25hp if i eventually do heads and cams and put on a 90mm throttle body?

bww3588

iTrader: (49)

A 90 mm on your stock intake would be pointless.

On a decent heads/cam car, the entire 102 setup has gained 35+ over an ls6 intake and tb.