A quick and easy test to see if your converter is functioning properly is to measure the temps of the pipes at the inlet and outlet of the cat - if it's working properly the outlet temp will be higher than the inlet. No change means you need a new cat.


95 Montero SR
3.8 MIVEC, Advance headers, 2 1/2" exhaust, Magnaflow muffler, OME shocks & rear springs, 2" body lift, 3" tank lift, 4.90s, TRE front locker, factory rear locker, Roger Brown Rock Sliderz, 315/75r16 (35") tires, Sport big brakes