Catalytic converter For S13, need to pass emissions, so, it has to be in good condition.
I have brand new 2.5" ones at $85.36
i have brand new cats , pre flanged , ready for bolt onto s13 in stock position.
ive got one that passed emissions $10 on pipe still and brand new magnaflow 2 1/4 2 1/2 and 3 inch