High Flow Cats

steven88 · 09-06-2009, 03:20 AM

is there a major difference between test pipe and hfc? i'm just wondering if its worth it to upgrade to full test pipes and save some money...i'll also throw on an o2 extender on my test pipes to avoid throwing a CEL

also, is it hard to see the hfc or test pipes under a 370z? i'm just hoping its being blocked by something so cops can't see it if they look under the car

Minicobra1 · 09-06-2009, 09:51 AM

Quote:

Originally Posted by steven88

is there a major difference between test pipe and hfc? i'm just wondering if its worth it to upgrade to full test pipes and save some money...i'll also throw on an o2 extender on my test pipes to avoid throwing a CEL

also, is it hard to see the hfc or test pipes under a 370z? i'm just hoping its being blocked by something so cops can't see it if they look under the car

I really can't see the benifit of test pipes on the 370z, the extra 2-3hp in the upper rpm range is just not worth it. HFC's will get you nice 10-15 HP gains, are not as raspy, and clearly look more stock on any visual inspection. Unless your out tracking the car every weekend, go with HFC's.

Togo · 09-06-2009, 10:38 AM

Quote:

Originally Posted by Minicobra1

I really can't see the benifit of test pipes on the 370z, the extra 2-3hp in the upper rpm range is just not worth it. HFC's will get you nice 10-15 HP gains, are not as raspy, and clearly look more stock on any visual inspection. Unless your out tracking the car every weekend, go with HFC's.

If I lived in CA I would do HFC.

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09-06-2009, 03:20 AM	#1 (permalink)
steven88 Base Member Join Date: Aug 2009 Location: Cerritos, CA Posts: 39 Drives: 08.5 mazdaspeed 3 Rep Power: 16	is there a major difference between test pipe and hfc? i'm just wondering if its worth it to upgrade to full test pipes and save some money...i'll also throw on an o2 extender on my test pipes to avoid throwing a CEL also, is it hard to see the hfc or test pipes under a 370z? i'm just hoping its being blocked by something so cops can't see it if they look under the car