Thinking of upgrade your 350z performance, I would advise you to upgrade too a GTM Spec 3" Downpipes. Adding the GTM Specs 3" Downpipes to your 350z customer turbo kit will improve your horsepower dramatically. The GTM's Specs 3" Downpipe Tuned for all-out performance for racing applications eliminates catalytic converter (For Off-Road Racing use, NOT C.A.R.B. exempt). The GTM's Specs 3" Downpipes are design eases installation with 100% T-304 Stainless steel construction. The GTM's Specs 3" Downpipes is made with CNC mandrel bends with robotically-welded fittings delivers perfect fit. GTM's Specs 3" Downpipes high performance downpipes, Turbo Up Pipe and Turbo Down Pipe for racing applications. The GTM Specs 3" downpipes eliminates your car's factory catalytic converter for maximum exhaust flow.

GTM Specs 3" Downpipes engineered for race applications with minimal exhaust flow restriction. GTM Specs 3" Downpipes replace the factory downpipe and catalytic converter and significantly improve exhaust flow. GTM Specs 3" Downpipes stainless steel flex joints are used to dampen the cat-back exhaust system from engine vibrations. GTM Specs 3" Downpipes are available in two different grades. GTM Specs 3" Downpipes are manufactured using aluminized steel and treated with high-temperature titanium particle coating. The GTM Specs 3" Downpipes are constructed entirely of SUS 304 stainless steel. So forget those thoughts of having a factory parts on your 350z and take a look at the GTM Spec 3" Downpipes today.