ISR Performance - High Flow Cat - Nissan 240sx 89-98 S13 S14

The ISR Performance High Flow Cat is a direct-fit catalytic converter upgrade for the 1989-1998 Nissan 240SX (S13 and S14). 300 cell spun metallic substrate flows significantly better than the factory cat while still converting harmful exhaust gases, and adds a more aggressive tone without going fully catless.

What It Does

The factory catalytic converter on the 240SX is restrictive and limits the gains from bolt-on intake and exhaust upgrades. The ISR High Flow Cat replaces it with a less-restrictive 300 cell metallic substrate that improves exhaust flow on KA24DE, KA24DE-T, or SR20DET-swapped 240SX builds while still meeting the emissions intent of the factory cat. The result is improved exhaust scavenging, a noticeable bump in power, and a deeper, more aggressive tone, all without removing the cat entirely.

Construction

300 cell spun metallic substrate. The metallic substrate is more durable than ceramic alternatives and handles the higher exhaust gas temperatures common on turbocharged builds (SR20DET, KA24DE-T) without breaking down.

Fitment

• 1989-1994 Nissan 240SX (S13)
• 1995-1998 Nissan 240SX (S14)

Bolts up to the factory exhaust or to aftermarket exhausts built to OEM specs. Works with both factory KA24DE engines and SR20DET swaps that retain the factory or OEM-spec downpipe-to-catback connection.

Product Details

Brand: ISR Performance

Part Number: IS-HFC-240

Type: High Flow Catalytic Converter

Vehicle Fitment: 1989-1998 Nissan 240SX (S13 and S14)

Engine Compatibility: Factory KA24DE, KA24DE-T builds, SR20DET swaps

Substrate: 300 cell spun metallic

Compatibility: Factory exhaust or aftermarket exhausts built to OEM specs

Sold: Individually

Legality: Off-road and competition use only