Fast Intentions Cat-Back & HF Cats Review

AH370Z

Tony, do you think this i due to the HFC. I'm not looking at getting the HFC and still going with the 18" resonators, As I want it quiet in the cabin

Thanks

F.I. Inc.

Yes, the HFC's will always attribute to more cabin noise. If you go with the 18" resonators and keep the stock cats it will be what YOU are looking for!

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TipsZ

How much does the Stock Cats restrict the HP and Torque, say compared to HFC's? I would prefer a little bit more exotic sound than stock, but not riced out or too much drone in the cabin.

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TipsZ journal

drisko

I believe the stock cats are quite restrictive. With the Fast Intentions CBE, adding the high flow cats only get you about 4whp more at the top end, but down low they give you a ton of torque gains. Also, with an intake or a tune, the HF cats will probably also yield a lot more gains.

The nice thing about the F.I. high-flow cats is they have a u-bend style non-fouler, and I have not had any check engine lights in over 200 miles of driving. Also, my highly subjective smog test (a.k.a. my nose) says that the cats are doing as good of a job as the stock ones in terms of emissions. I detect no smells or smoke at all coming from the vehicle.

Also, as far as droning, it is really not that bad. I think it just took me a little bit to get used to the sound of a more aggressive exhaust system.