Maximum horsepower demands the least possible exhaust back pressure - and the stock cats is an area that can be improved in terms of reducing back pressure in off-road conditions. The APS Test Pipes are the perfect addition for competition events such as drag racing and Autocross where smog compliance is not mandatory.
APS has designed the ultimate set of test pipes to remove the exhaust gas restriction produced by the stock cats. Twin 2.5" pipes crafted in 304 Stainless Steel, precision mandrel formed and TIG welded come complete with all mounting hardware required for easy installation.
As with all APS exhaust systems, the APS Test Pipes are manufactured precisely in sturdy jigs to ensure that the position and orientation of each and every flange, mount point, sensor boss - and indeed all dimensional aspects of the test pipes meet APS's exacting requirements.
Not for the faint hearted as these APS test pipes unleash the fabulous exhaust note that lurks in the heart of every Z!