ISR Performance ST Series Exhaust for Nissan 350Z 03-08

The ISR Performance ST Series Exhaust for the 2003-2008 Nissan 350Z is the aggressive end of our 350Z catback lineup. Y-pipe back system with dual 2.5" piping, bottle-style resonators, twin aggressive mufflers, and 4" tips. Direct bolt-on to the factory Y-pipe (or pair with the IS-Z33-Y aftermarket Y-pipe for a complete catback path).

What It Does

Y-pipe back catback. Bolts to a 2-bolt 3" flange off the Y-pipe and splits into dual 2.5" pipes that run through bottle-style resonators, then continue back to twin muffler sections with 4" tips. The bottle resonators take the edge off droning at cruise while the dual muffler section gives the 350Z the deeper, more aggressive note that ST Series cars are known for. Designed to replace both the factory mid-pipe and rear muffler section in one go.

Fitment

Designed for the 2003-2008 Nissan 350Z (Z33 chassis). Pair with the IS-Z33-Y Y-pipe (for 350Z/G35 RWD); do not use the IS-Z34-Y, which is for the 370Z/G37/Q60 3.7L platform. For alternative 350Z exhaust styles, see:

• IS-GT-350Z (Single GT, refined single-exit). referenced but not yet templated
• IS-EPDual-350Z (EP Dual blast-pipe, more aggressive single-stage)
• IS-EPTI-350Z (titanium EP Dual, ~9 lbs total weight)

What's in the Box

• 1x resonator section
• 2x muffler sections with 4" tips
• 3x 2-bolt 2.5" exhaust gaskets
• 6x bolts
• 6x nuts

Product Details

Brand: ISR Performance

Part Number: IS-ST-Z33

Type: ST Series Y-pipe back catback exhaust

Vehicle Fitment: 2003-2008 Nissan 350Z (Z33)

Material: Stainless steel

Piping: Dual 2.5"

Resonators: Dual bottle-style

Mufflers: Dual, aggressive, with 4" tips

Flange: 2-bolt 3" (bolts to factory Y-pipe)

Companion Y-pipe: IS-Z33-Y (350Z/G35 RWD only)

Sold: Complete kit

Legality: Off-road and competition use only