Anyone with HFC or Test Pipe regrets?

Jordo! · 08-14-2014, 10:41 PM

My advice is to ONLY get ones that are resonated.

Non-resonated pipes/cats will be far raspier.

Roddy1 · 08-15-2014, 11:23 AM

For me its between choosing a mid pipe or the HFC's.... unfortunately every shop around here wants 5ish hours to install HFC's on my 370Z....Consider the price of the HFC's.. and the install this gets very pricey.

Chasedixon21 · 09-16-2016, 05:46 PM

I have the stillen HFC on mine with the AAM shortys. I have had them on for prolly 5000 miles or so lot of highway driving and my bumper is fine, and there is no smell compared to test pipes. Sound is ******* nice throaty as **** at 3500-4500. It is quieter in the top end because i still have the restrictive stock y pipe. Im thinking of getting an exaughst shop to custom make me an x-pipe to take the place of the stock y-pipe. Anyone have experience with this?

Cegla · 09-17-2016, 03:51 AM

I installed HFC two days ago. There is only minor rasp on full throttle acceleration. No rasp at mid range rpm or hiss during deacceleration.
Most important - car is alot faster! I will do dyno in few days but my racelogic shows much better acceleration times from 0 to 100 and from 100 to 200 ( kph ).
Im very satisfied.

08-14-2014, 10:41 PM	#31 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	My advice is to ONLY get ones that are resonated. Non-resonated pipes/cats will be far raspier. __________________ Enjoy it. Destroy it.

08-15-2014, 11:23 AM	#32 (permalink)
Roddy1 Enthusiast Member Join Date: Jan 2014 Location: Canada/Cayman Islands Posts: 274 Drives: SRT Viper Rep Power: 11	For me its between choosing a mid pipe or the HFC's.... unfortunately every shop around here wants 5ish hours to install HFC's on my 370Z....Consider the price of the HFC's.. and the install this gets very pricey. __________________ 2011 370Z, 6-Speed Manual, Sport Package. - K&N Drop ins \| Top Speed Axleback \| H&R Spacers SOLD 2009 G8 GT, 6.0L LSX V8, Rotofab Intake, ARH Long tubes, SOLO exhaust, VMS Tune - SOLD

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09-16-2016, 05:46 PM	#33 (permalink)
Chasedixon21 Base Member Join Date: May 2016 Location: Fl Posts: 52 Drives: 2014 370z manual Rep Power: 9	I have the stillen HFC on mine with the AAM shortys. I have had them on for prolly 5000 miles or so lot of highway driving and my bumper is fine, and there is no smell compared to test pipes. Sound is ***** nice throaty as ** at 3500-4500. It is quieter in the top end because i still have the restrictive stock y pipe. Im thinking of getting an exaughst shop to custom make me an x-pipe to take the place of the stock y-pipe. Anyone have experience with this?

09-17-2016, 03:51 AM	#34 (permalink)
Cegla Base Member Join Date: Mar 2013 Location: Poland Posts: 18 Drives: 370Z GT Edition Rep Power: 12	I installed HFC two days ago. There is only minor rasp on full throttle acceleration. No rasp at mid range rpm or hiss during deacceleration. Most important - car is alot faster! I will do dyno in few days but my racelogic shows much better acceleration times from 0 to 100 and from 100 to 200 ( kph ). Im very satisfied.