Q300/perrin catback design - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

xsnapshot · 05-04-2015, 06:06 PM

I know these two catbacks are on the quieter side of things, but how do they actually compare to the stock catback in terms of flow? They are obviously not straight-through designs.

My question is, do they actually provide a benefit in terms of less restriction that is even statistically noticeable vs stock, to justify the price? Other than dyno testing, I'm not sure how you'd quantify this.

I'm looking at getting one of the two. With a catless header and catless 2.5" piping from the header back to the catback, would a stock muffler be much of a detriment in power?

Thoughts?

continuecrushing · 05-04-2015, 06:19 PM

If N/A, buy a catback based on sound. Nothing else.

kch · 05-04-2015, 06:37 PM

Yeah, you're not gonna gain any real power with a catback unless and until you go turbo + 3" pipes

xsnapshot · 05-06-2015, 12:41 PM

So no one knows eh?

I'd be curious to see the inside of either of these exhausts. I doubt anyone has cut one open though.

What would really be neat is to see the dB/psi of back-pressure ratio between stock and these two exhausts. I'd be interested in knowing if you could achieve a larger dB reduction at the same or less back pressure.

PERRIN_Chris · 05-06-2015, 02:19 PM

Back in the day D sport did an article comparing a lot of exhausts back to back on the dyno.

You can read the article on the PERRIN 2.5" here: http://www.ft86club.com/forums/showp...&postcount=108

Muaddib · 05-06-2015, 03:16 PM

5-10rwhp is not bad considering our car only dyno at around 150-160rwhp.

05-04-2015, 06:06 PM	#1
xsnapshot Fast enough Join Date: Jun 2013 Drives: 2013 Subaru BRZ AT Location: nashville Posts: 175 Thanks: 11 Thanked 56 Times in 38 Posts Mentioned: 3 Post(s) Tagged: 2 Thread(s)	Q300/perrin catback design I know these two catbacks are on the quieter side of things, but how do they actually compare to the stock catback in terms of flow? They are obviously not straight-through designs. My question is, do they actually provide a benefit in terms of less restriction that is even statistically noticeable vs stock, to justify the price? Other than dyno testing, I'm not sure how you'd quantify this. I'm looking at getting one of the two. With a catless header and catless 2.5" piping from the header back to the catback, would a stock muffler be much of a detriment in power? Thoughts?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
FS: Perrin 3in Catback Exhaust, Perrin 3in Front Pipe, Perrin Overpipe SOLD	johnb831	Engine, Exhaust, Bolt-Ons	13	05-21-2015 06:27 PM
Invidia Q300 vs. Perrin Catback (Non-resonated)	Taylor13	Engine, Exhaust, Transmission	26	02-06-2014 08:26 PM
Borla UEL with Quiet Catback! Perrin resonated or invidia Q300	JakeFromStateFarm	Engine, Exhaust, Transmission	5	11-07-2013 11:42 AM
Invidia q300 catback titanium	Howardwei	Engine, Exhaust, Transmission	0	07-25-2013 09:30 PM

05-04-2015, 06:19 PM	#2
continuecrushing Join Date: Mar 2013 Drives: 2013 Firestorm FRS Location: Lake Elsinore, CA Posts: 2,707 Thanks: 1,231 Thanked 2,144 Times in 1,003 Posts Mentioned: 73 Post(s) Tagged: 2 Thread(s)	If N/A, buy a catback based on sound. Nothing else.

05-04-2015, 06:37 PM	#3
kch Senior Misanthrope Join Date: Sep 2014 Drives: 2015 BRZ Series.Blue CWP Location: Seattle, WA Posts: 1,490 Thanks: 1,743 Thanked 1,169 Times in 645 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	Yeah, you're not gonna gain any real power with a catback unless and until you go turbo + 3" pipes

05-06-2015, 12:41 PM	#4
xsnapshot Fast enough Join Date: Jun 2013 Drives: 2013 Subaru BRZ AT Location: nashville Posts: 175 Thanks: 11 Thanked 56 Times in 38 Posts Mentioned: 3 Post(s) Tagged: 2 Thread(s)	So no one knows eh? I'd be curious to see the inside of either of these exhausts. I doubt anyone has cut one open though. What would really be neat is to see the dB/psi of back-pressure ratio between stock and these two exhausts. I'd be interested in knowing if you could achieve a larger dB reduction at the same or less back pressure.

05-06-2015, 03:16 PM	#6
Muaddib Mentat Join Date: Jun 2013 Drives: 2013 Scion FRS 6MT Location: Vancouver Posts: 542 Thanks: 666 Thanked 358 Times in 198 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	5-10rwhp is not bad considering our car only dyno at around 150-160rwhp.

User Name		Remember Me?
Password