ISR Performance High Flow Cat - Nissan 240sx

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ISR Performance High Flow Cat - Nissan 240sx 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**Legal only for use in competition vehicles which may never be registered, licensed, and/or used on public streets or highways; and also for use in other exempted vehicles. Show more