ISR Performance Straight Dual 3" Tip Exhaust - Nissan 240sx 89-94

The ISR Performance Straight Dual 3" Tip Exhaust for the S13 240SX is the original pre-Series II race-style dual blast-pipe catback. 3" piping splitting to dual 3" tips, no resonator, no mufflers, just pure flow. Built for track use where weight reduction and sound aggression matter more than refinement.

What It Does

Pure race exhaust: no sound dampening anywhere, full straight-through flow, dual 3" tip outlet. It's loud, it's aggressive, and it's not subtle. The dual-tip rear gives the S13 the blast-pipe look without going as wide as a 4" tip variant. Original (pre-Series II) ISR design, predating the modular catback family.

Fitment

Designed for the Nissan 240SX 1989-1994 (S13 chassis). This is a pre-Series II exhaust and is not compatible with Series II modular components (mid sections, modular rears). If you want a system you can later modularize with different rear styles, see the Series II catback lineup instead. The IS-EPDual-S13BO is the dual 4" tip variant in the same pre-Series II family.

Product Details

Brand: ISR Performance

Part Number: IS-EPDual-S13

Type: Straight-pipe catback exhaust (race)

Vehicle Fitment: Nissan 240SX 1989-1994 (S13)

Piping: 3" straight, splitting to dual 3" tips

Mufflers: None

Resonator: None

Series: Pre-Series II (legacy ISR design, not modular)

4" Tip Variant: IS-EPDual-S13BO (same pre-Series II family, dual 4" tips)

Series II Alternatives: IS-S2EPSR-S13, IS-S2EPSNR-S13 (EP Single), IS-S2GTR-S13/IS-S2GTNR-S13 (GT Single), Series II EP Dual catbacks (S13)

Sold: Complete kit

Legality: Off-road and competition use only