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Special.Ed.61 · 03-25-2021, 09:58 AM

You don't need a tune immediately after installing them. But you'll want a tune to get the most benefit from your intake/exhaust mods. just make sure that whoever is doing your cats doesn't use power tools/impact drills to remove and install. This WILL kill your 02 sensors. I just went through this.

03-25-2021, 09:58 AM	#5 (permalink)
Special.Ed.61 Base Member Join Date: Jun 2020 Location: Phoenix Posts: 16 Drives: 2015 370z Touring AT Rep Power: 4	Hfc's You don't need a tune immediately after installing them. But you'll want a tune to get the most benefit from your intake/exhaust mods. just make sure that whoever is doing your cats doesn't use power tools/impact drills to remove and install. This WILL kill your 02 sensors. I just went through this. __________________ Ed 2015 370z Touring AT, Fast Intensions HFC's, HKS Hi-Flow Catback, K&N Drop ins.