besides the O2 sensor's location, what are the differences between the two? does the fed spec maxima go faster at stock than ca spec maxima? if so, is it because CA spec has harder emission? correct me if i'm wrong...just curious about the 2 types that's all.

 

fed spec - 2 cat converters, cali spec - 3... slightly more exhaust flow with a fed spec & tougher emissions on a cali spec. thats all i know

 

btw...how does it affect smog test? will the fed spec maxima have easier time passin the smog than the ca spec?

i have a fed spec, but i live in CA, smog is comin up soon for me, so just wondering...

 

The CA spec is made for CA emmissions so it would have an easier time than the fed spec. If your cat is working and your tune up is up to date you should be fine.

 

cali spec maximas also have swirl control valves inside the lower intake manifold. they help with combustion efficiency, but it cuts down total air flow volume.


EDIT: cali spec maximas have 4 O2 sensors also.

 

anyone has stock dyno figures to compare fed spec vs ca spec?

 

Too little difference between the two, supposedly a Fed spec has a couple more HP

 

Theres not enough difference like cutlr7 said, I drove a 95 5 spd., then my 99 when I got it and i think it felt a little more lively. Theres almost no difference

 

better throttle response on a fed spec.

 

great! thx for the inputs