ISR Performance O2 Turbine Extension - Nissan SR20DET 3"

ISR Performance built the first true 3 inch turbo outlet for the Nissan SR20DET, and this is it. Every other turbine outlet necks down somewhere between the turbo flange and the downpipe; the ISR 3 inch O2 turbine extension holds a full 3 inch diameter the whole way, which makes it the higher flowing choice for an S13 T25, S14 T28 or GT series turbo.

What sets it apart

• True 3 inch outlet with no neck down
• Double welded on the outside and inside to prevent cracking
• New brushed finish
• Includes all gaskets and hardware required for install

Specs

• 3 bolt flange thread pitch: M10 x 1.5
• Bolt length: 1 3/4 inch

Why a turbo outlet

Turbo outlets increase exhaust flow and free up horsepower, and ISR rates this as a great bang for the buck upgrade. The factory housing is a restriction right at the turbine where it hurts the most, so a larger outlet helps spool, reduces backpressure, and pairs naturally with a 3 inch downpipe and exhaust.

Fitment

Nissan SR20DET S13 with the T25 turbo, S14 with the T28 turbo, or a GT series turbo with the same outlet flange.

Install notes

This unit requires you to reuse your OEM turbine housing studs and nuts. Because of the larger 3 inch diameter, slight clearancing of the bellhousing or flange may be required. Test fit before final assembly, use anti seize on the hardware, and recheck torque after the first heat cycles.

All ISR Performance products are designed for off-road use only.