Inliners International Forums General Discussion Engines Infamous Chevy 292 3-bolt exhaust flange

If you would turbo a L6 w/the stock exhaust manifold., I think it would be better to use the larger outlet.

I never seen anyone use the 2.5" one being used for a turbo yet.

I have a coulple 2 bolt flange manifolds & I am pretty sure they could be opened up to 2" w/out much fuss.

MBHD