ISR Performance 3" Stainless Steel Test Pipe – Nissan 240SX S13 / S14 | 1989–1998

Unlock maximum exhaust flow from your S-Chassis with the ISR Performance 3" Stainless Steel Test Pipe. Designed to replace the restrictive factory catalytic converter on the Nissan 240SX S13 and S14, this test pipe eliminates back pressure for significant horsepower and torque gains throughout the RPM range — and a more aggressive exhaust note to match.

Constructed from T304 stainless steel with TIG-welded construction, the ISR test pipe is built to withstand the heat and rigors of performance and competition driving. The 3-inch diameter is perfectly matched to aftermarket turbo downpipes and cat-back exhaust systems, making it a critical component for any serious SR20DET or KA24DE build.

Key Features

• Maximum Flow Design: Replaces the OEM catalytic converter to eliminate back pressure and boost horsepower and torque across the RPM range
• T304 Stainless Steel: Exceptional durability and corrosion resistance built for performance and competition use
• TIG-Welded Construction: Superior weld quality for long-lasting, leak-free performance
• 3-Inch Diameter: Optimized for high-power applications — seamlessly connects to most aftermarket 3" exhaust systems
• Direct Bolt-In Fitment: Precise fit for all 1989–1998 Nissan 240SX S13 and S14 chassis
• Complete Kit: Includes all necessary gaskets and hardware for a straightforward bolt-on installation

Fitment

• 1989–1994 Nissan 240SX S13 — KA24E, KA24DE, SR20DET
• 1995–1998 Nissan 240SX S14 — KA24DE, SR20DET

⚠️ Off-Road / Competition Use Only: This part removes an emissions control device and is intended for off-road and competition use only. Not legal for use on public roads where emissions regulations apply. Verify local regulations before purchase.