ISR Performance High Flow Catalysts are custom fabricated using a 300 cell spun metal substrate to be less restrictive than stock, allowing you to gain horsepower while converting harmful exhaust gases, ISR HFCs are fully TIG welded with true mandrel bends.

ISR Performance HFCs bolt onto a factory or aftermarket exhaust (as long as the aftermarket exhaust is built to OEM specifications). ISR HFCs also retain the oxygen sensor location and add a more aggressive exhaust sound.

**IF YOU HAVE A 2007+ 350Z/G35 WITH HR ENGINE PLEASE USE THE 370Z/G37 MODEL**

CONTENTS OF THE BOX:

-2 high flow stainless steel catalysts
-2x 2-bolt exhaust gaskets
-2x 3-bolt exhaust gaskets
-2 x Extension Tubes for o2

**ALL ISR PERFORMANCE PRODUCTS ARE DESIGNED FOR OFF-ROAD USE ONLY**