The ISR Performance test pipes are constructed using high quality stainless steel. These test pipes utilize stock flange locations so they can be used with stock components or aftermarket (Provided they aftermarket components use stock style flanges and mounting locations).
These test pipes will eliminate your catalytic converter, and are designed for off-road use only. Their straight through design will help add the maximum amount of horsepower and torque to your VQ, especially when paired with the ISR Y-pipe and exhaust!
** All ISR Performance Products are Designed for Off Road Use Only **
Our new Compatibility checking feature is still being updated and revised. If you have questions about vehicle fitment, please contact us.
What is the inside diameter measurement?
Hi Jordon, the inner diameter is 60mm (~2.36")
Will this fit a g37XS Sedan