cat size differnces and test pipe
i have a borla exhaust and obx header ready to put on my 98 base model 3kgt. but i want to get rid of the catalytic converter and sub in a test pipe. the header and exhaust though 2 diffrent brands are both fitted to my cat. i found a test pipe that is listed to apply to the SL and VR-4 but said nothing about the base model. i guess my question is do the SL cats have the same inlet and outlet sizes as the base. and any other pointers would be great. thanx.
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