Please verify the length of the cat on your car before ordering so we can ship you the right version. California spec cars got a different cat that is a different length.

APPLICATION: 1986.5 to 1992 Supra

We are now shipping professionally fabricated "test-pipes" in 3.0" diameter for the MK3 Supra (non-turbo and turbo). The 3.0" diameter test pipes are perfect for modified and/or Supra's running larger diameter exhaust systems with downpipes.

Inset picture shows a complete 3.0" exhaust system. The section on the far left is the downpipe. The center (black to show for photo) is the test pipe and the right is what is commonly referred to as a cat-back exhaust. Thanks Paul S. for the photo! In this picture, the downpipe connects to the test pipe, which in turn connects to either the factory exhaust or an aftermarket cat-back exhaust.

What is a test pipe?

Simple. A test-pipe is used to replace the catalytic converter on cars to "test" if the cat as clogged or not and will verify for you. Simple bolt-in performance product with only 4 bolts (can be obtained at any hardware store if not reusing the factory ones). Excellent bang for the buck performance. Test pipe can be used with our various downpipes for total CAT elimination, or it can be used with a factory exhaust or aftermarket exhaust as well.

Please check your local laws, as this is intended strictly for off-road vehicles only. Super illegal in California. Although we make a version for California cars, this is not California compliant. Not even a little