ISR Performance Series II GT Single Exhaust System -Resonated- Nissan 240sx 89-94 (S13)

The ISR Performance Series II GT Single Resonated Catback for the S13 240SX is a complete modular exhaust system built on the Series II architecture. 3" piping through the mid and most of the rear, expanding to a 5" round muffler with a 4.5" extended tip. The inline resonator keeps cruise drone in check while keeping the GT Single's signature single-exit look and tone.

What It Does

Complete catback replacement for the S13. Series II construction routes the piping for more ground clearance than older ISR catbacks, the extended tip clears both factory and aftermarket aero bumpers cleanly, and the resonated mid takes the edge off highway droning without choking flow. The modular architecture means you can later swap the GT Single rear for an EP Single or EP Dual rear without buying a new mid section.

Fitment

Designed for the Nissan 240SX 1989-1994 (S13 chassis). Not backward-compatible with the original (non-Series II) ISR S13 exhausts.

What's in the Box

• 1x GT Single rear section
• 1x resonated mid section
• 1x gasket and hardware pack

Product Details

Brand: ISR Performance

Part Number: IS-S2GTR-S13

Type: Series II modular catback exhaust (resonated)

Style: GT Single (5" round muffler, 4.5" extended tip)

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

Material: Stainless steel

Piping: 3" mid and rear, expanding to 5" round muffler with 4.5" tip

Resonator: Inline on mid section

Non-Resonated Alternative: IS-S2GTNR-S13 (same kit with non-resonated mid)

Modular Swap Options: IS-S2RO-EPS-S13 (EP Single rear), Series II EP Dual rear (S13)

Sold: Complete catback kit

Legality: Off-road and competition use only