bmatsu

I was wondering if the 2jzge motor on the IS has a sport exhaust manifold, or a manifold that has better flow than the SC300 manifold. Looking to rebuild my motor (bore and stroke) and to pass CA smog.

baadhabit

iTrader: (2)

not sure what a "sport exhaust manifold" is but my guess is a SC OEM manifold flows better than the IS OEM manifold due too the 3 cats that are attached to the IS exhaust manifold.

California and theyre crazy restrictions.