No Catalytic Converters

FL 4Motion

Just want to add one more thing, I was just perusing the latest EPA reg update from December 2020. They reiterated that epa compliant cats are ok, but they’ve tightened regs on OBD tampering. In other words, only afaik carb approved tuning is epa compliant regardless of hfc used.

Example, APR has apr plus carb approved stage 1 tines for many vehicles. Edelbrock has carb approved s/c for Jeeps that includes a locked carb compliant tune. I’m not sure anything like this exists for the 370z.

This is good motivation to pick up a z35 since it’s tt from factory and carb approved stage 1 tuning is pretty easy to get for turbo cars.

djburke87

Well, I think I'm going to look into getting HFCs, just to be compliant and whatnot. Plus it will probably help resale if I ever sell my car. They should also reduce the rasp in my exhaust tone.

So Fast Intentions is the way to go? The only other exhaust mod I have is AAM Resonated Short Tales. Anyone have this axleback and have an HFC they like?

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2018 Nismo - Z1 Cold Air Intake, Z1 Silicone Hoses, Catalytic Converter Delete, Remark Axleback V1 Exhaust

Leingod

If you have the cash and don't mind the wait time, FI is definately the way to go. I've been running the rhfcs for years without a single issue. I ran them initially with stm short tails. They're now paired with FIs full exhaust. With the short tails, it was loud, but maneagable. You will piss off your neighbors in the morning. With a full exhaust, you can have a conversation in the cabin without yelling.

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I AM FLOOF! SOMEBODY FLOOF MY HORN!! ALL HAIL THE FLOOF!!I JUST FLOOFED ON THE FLOOR

djburke87

I leave before most of my neighbors wake up, so I'm sure most of them don't even set alarm clocks because the just consider my cold start all the alarm they need.

It would be nice to have a conversation once in a while I guess, but getting rid of the rasp is my main concern. I actually put a different axleback on my car 2 days ago that had bigger resonators on it, but the cold start was just as loud. The cruising drone was less though. I like the way the AAM Short Tales look and sound better, though, so I switched back.

If I go with Fast Intentions, should I get the High Flow Cats (HFCs) or the Resonated High Flow Cats (RHFCs). I see on their website they only have the RHFCs for sale, but I heard the used to make non-resonate ones. I'm sure I could find some if I look hard enough.

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2018 Nismo - Z1 Cold Air Intake, Z1 Silicone Hoses, Catalytic Converter Delete, Remark Axleback V1 Exhaust

zeeder

Steve Dinan was on The Smoking Tire Podcast and he was saying that you don't need to remove the cats!

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Zack
FI catback, HFC, and Start Button - Z1 Intake - Nismo S-Tune Spoiler - PasswordJDM V2 Shift Knob