blkmkiii

iTrader: (2)

Anyone here use the cali exhaust manifold and remove the 4 bolt section and build downpipe to your exhaust system. This would save 2 points without the header back in tte and possibly yield better power than the non cali manifold, but not as good as a header. Thoughts?

18psi

iTrader: (76)

it would not yield more power than a non-ca manifold.

flier129

iTrader: (7)

You should do dyno tests with this CA manifold and the US manifold with custom downpipes. Then, let us know the results!

I've thought about using the US OEM manifold with a custom downpipe, but since I'm lazy I didn't actually do anything.