98maxaholic

I know the 99 cali specs are PIA's with the swirl valves and such...but i belieive i have a 98 cali ...whats the difference between a 98 fed and 98 cali...i cant seem to find much of a difference if any??

njmaxseltd

iTrader: (19)

4 O2's - I think the swirl vales are exclusive to the 99 Cali.

98maxaholic

But ive checked my metal plate under the hood, and im pretty sure that it says my 98 is a cali car. i know the 99calis have 402's...but my 98 only has 302 sensors..whats the difference if any with a pre 99 cal spec from fed spec?

CMax03

iTrader: (3)

cali- precats...fed-none

Quickywd01

iTrader: (16)

At least pre-cats. One pre-catalytic convertor in each exhaust manifold bank. Also the location of the 02's. It's worth switching to factory fed spec exhaust manifolds if not headers.

98maxaholic

Well when the time comes i planned on getting aftermarkets without any precats anyway....so what ur saying is a 98 fed spec has no precats in the y pipe....nice to know....and man am i glad i havent got a 99 cali spec! i had to put a knock sensor in and im glad i didnt have to contend with the stupid swirl valves that come on a 99 cali!!

dwapenyi

iTrader: (3)

Just get a y-pipe and done. My car is a 98 Cali too....I've compared it often to my buddy's 99 Cali. Way less complicated. Mine has 3 O2s total, 2 for pre-cats and 1 for the main cat. That's it.

njmaxseltd

iTrader: (19)

Every A32 4th gen has pre cats, both Cali and fed. Fed doesn't monitor them, Cali does.

CMax03

iTrader: (3)

Ok! I stand corrected...