The factory catalytic converters are well known as the biggest "choke point" in the factory exhaust system. These high flow stainless spun catalytic converters blow away the stock converter flow rates while still maintaining legal emissions levels.

Constructed with stainless tubing and 3/8" stainless flanges (converters are aluminized steel). Fully TIG welded and true mandrel bends used throughout.   These converters will bolt up to any header (factory or aftermarket) and any exhaust (factory or aftermarket).  These pipes also retain the factory Oxygen sensor location.

Expect great performance gains from these converters as they have dyno'd between 7-9 hp at the wheels on factory 350Z's. They only add a slightly more aggressive exhaust note and do not have the pesky "raspiness" between 3-4k rpm that is seen with straight through test pipes.

These pipes come complete with gaskets, bolts, washers, and lock nuts.

Often the RTV sealing method or composite gasket for the 3 bolt flange from the manifold to the test pipe doesn't hold up over time due to extreme exhaust temperatures and can fail leading to irritating exhaust leaks and potential Check Engine Lights.  To solve this potential problem Z1 has designed and produced our very own multilayer metal exhaust gasket for this application.  This gasket is similar in construction to the manifold to turbo gaskets we have used for years on turbo applications.  It has proven to be one of the strongest and most robust parts on any car we have used them on; these gaskets can be removed and reinstalled countless times without any problems.  You may select adding a discounted pair as an option below. 

NEW RELEASE - Hi-flow cats for the 07+ 350z / G35

Fits:

• 2007+ Nissan 350Z 3.5L (VQ35HR)
• 2007+ Infiniti G35 Sedan (VQ35HR)

*New and Improved with more installation clearance and long term strength!

  ** "Spun" cat design has a full stainless construction for much higher strength and flow

  ** More clearance for easier installation