ISR Performance Bell Mouth Downpipe - Nissan Skyline R32 GTST R33 GTST

The ISR Performance Bell Mouth Downpipe for the R32 and R33 Skyline GTS-T is a 3" one-piece stainless steel downpipe that replaces the restrictive factory unit. Bolts directly to the turbo with the bell-mouth flare, opening up flow and freeing up real horsepower from the RB20DET (R32) or RB25DET (R33).

What It Does

The factory R32/R33 GTS-T downpipe is a known flow restriction. bottle-necked at the turbo flange and undersized through the rest of its run. Stepping up to a 3" one-piece stainless unit gives the turbo a clean exhaust path, which is the single highest-return mod on a stock-turbo RB build. The bell-mouth design at the turbo flange smooths the transition between the turbine outlet and the downpipe, reducing flow turbulence that would otherwise cost you mid-range response.

Fitment

Designed specifically for the Nissan Skyline R32 GTS-T (RB20DET) and R33 GTS-T (RB25DET). RHD chassis only. Will NOT fit RHD-to-LHD converted vehicles. the routing is built around the factory RHD Skyline layout.

Product Details

Brand: ISR Performance

Part Number: IS-SSDP-BMR323

Type: Bell mouth downpipe (one-piece)

Vehicle Fitment: Nissan Skyline R32 GTS-T (RB20DET), R33 GTS-T (RB25DET)

Chassis Orientation: RHD only (will not fit LHD conversions)

Diameter: 3"

Construction: One-piece stainless steel

Turbo Connection: Bell-mouth flare

Sold: Individually

Legality: Off-road and competition use only