ISR Performance High Flow Cat Nissan 240SX 1989-1998 S13 S14 | IS-HFC-240 vendor_CTEK The rear will also benefit

The rear will also benefit from stiffening as well

Simply stated

Subaru BRZ 2012-2016 All Models

This Subaru WRX and Legacy GT specific kit is designed very similarly to your stock blow off valve by hooking up to the recirculation fitting

ISR Performance High Flow Cat Nissan 240SX 1989-1998 S13 S14 | IS-HFC-240 vendor_CTEK The rear will also benefitPart #: IS HFC 240 ISR Performance high flow cats are custom made utilizing high flow 300 cell spun Metallic substrate to be less restrictive than stock, Letting you gain power while still converting harmful exhaust gasses, ISR Performance HFC bolt up to factory or aftermarket exhaust (as long as the aftermarket exhaust is built from OEM specs). ISR HFC adds a more aggressive Exhaust tone. **For off road use only**