resonator, or what? Options

[Galcobar]

That generic diagram isn't useful in telling you what's actually under your specific car -- you'll note for instance it lacks a flexpipe entirely.

Toyota does not, as a rule, put the resonator at the end of the exhaust run -- they prefer to put a muffler at the end. Keep in mind a resonator is not a muffler, despite many marketers and retailers applying the term resonator to round-body mufflers. What you'll normally see is manifold-catalytic converter-flex pipe-resonator-muffler. The primary cat is often attached directly to the manifold and acts as a collector pipe. For those systems with two catalytic converts, the sub-catalytic converter will be mounted between the flex pipe and the resonator, with the resonator moving back from the front exhaust pipe to the centre pipe. In systems with two cats and two mufflers, the resonator is usually omitted.

If you want to know whether emissions testing is required in your state or county, check their website. Or Google emissions testing in your area, and get this: http://www.dmv.org/pa-pennsylvania/smog-check.php

[d3ath2009]

^primary is NOT attached to manifold on these cars.. mine has always had one cat from the factory and its the one down under the car

[94odiecelica]

^primary is NOT attached to manifold on these cars.. mine has always had one cat from the factory and its the one down under the car

so would that mean if yours is a 94 st and mine is too miine will be the same, or will they make 94 st's- some with one cat,and some with two?

[mandrek]

from what i can tell the 94-95 ST had TWO cat's, primary in the manifold, and secondary is located down stream.. (non cali-spec[my original setup]), and the 96+ST had ONE cat, down stream of the manifold (under the car) (non-cali spec)


With the changes in 96 (OBDII) with sequential injection, and better emisions control. looks like that they did not need to have a primary cat in the manifold (again, not sure about the cali-spec).. at least that is from what i have been able to gather.