Ihtbealexxx

So far the only other performance mods I have are my ARK cutback and R2C intakes. I'm planning to finally get BERK HFCs done in the next month. I'm just wondering if I'll need a tune or if I can run without one once I add the BERK HFCs.

Mr_Mer

iTrader: (2)

It is my understanding that there will be some leanness, just don't know how bad it is going to be. I am going with "if exhaust smell like gas while it idles" a tune we will be getting.

I am about to do the ARK+Berks myself within the month. Anyway, I think a tune would be a good thing regardless.

SonicVQ

Why do you think it will run lean?
The A/F (air/fuel) sensor will detect any lean or rich condition and adjust the air/fuel mixture (via the short & long term fuel trims) to meet the designed target.

Don't worry and have fun modding the car.

Rochester

iTrader: (9)

It's not going to run worse, if that your worry. And the car will likely have more power than otherwise. Enjoy the mods, and get it tuned someday, but not as a requirement brought on by high-flow cats. Do it on your own time as a modification in its own right.