Perrin 3" Catback Exhaust
 

Hey everyone! So I've been debating on if the Perrin 3" Catback Exhaust is the right one for my car. My car is completely stock and I really have no plans to go full exhaust for a while. At first I was going to go with the 2.5" unresonated exhaust but some people have been saying the 3" resonated or unresonated exhaust gives the car a better tone. Which should I go for? Unresonated or resonated on 3" or just stick with a 2.5"? All I want in my exhaust is no drone, nice rumble/growl at the low rpms (casual driving), and nice sound on WOT. I just want an exhaust that gives a noticeable sound difference from stock (can actually hear the exhaust was changed out basically). Thanks!

Second this, I would like to know the same thing. Also what's the difference between the 2.5" and 3"? Besides the obvious half inch, why the half inch more?

@uEih the .5" extra allows for more flow... it also is a bit louder.
@JohnAyySays I have the 3" perrin resonated on my car. It is dreamy. No drone, just great sounding. Also, not too loud, driving with windows up is completely reasonable. It is hard not to rev when sitting at a light!

[ame="http://www.youtube.com/watch?v=X-F0TECUuYM"]Drift-Office : Vortech Supercharger BRZ / FRS / GT86 with Full Perrin Exhaust (Catted) - YouTube[/ame]

Perrin 3 Inch RES exhaust. Sounds awesome! :)


Bob @ Drift-Office, LLC

Nice! Do you think the 3" has to be solely used on turbo/supercharged cars? Is yours NA? Any mods other than exhaust?

THere's no reason to run a 3 inch exhaust on a NA car - generally, you'll loose torque and it's a louder exhaust note. I prefer to see at least a 3 inch in FI environments since most of the FP / OP offerings are still 2.5 inch to ensure crossmember clearance, etc etc...


Bob @ Drift-Office, LLC

My innovate kit gets installed next week. I have a Perrin 3" front pipe as well. Innovate IC kit + flex fuel on their way.

The Perrin 3" provides just the right exhaust note and volume I was looking for (currently still NA). There was no noticeable loss in torque down low although as many have said you probably will have some.

Where I did notice a differene in torque was after installing the 3" front pipe. Still doesn't bother me as I am setting up for FI.

I've heard both in person. Here are my thoughts:

1) The 2.5" versus 3" on a non-FI car will not yield any significant gains, if any at all
2) The 3" is the best choice if your plans are FI down the road with a proper intake, headers, over pipe & front pipe
3) ultimately, your catback (I mentioned this in another thread somewhere) is only as efficient as what's coming out of the engine. If the rest of your system is stock, you could have a 5" catback (lol) and it wouldn't change anything
4) The sound...the 3" somehow seems more refined. While it's slightly bass-ier, under WOT and spirited acceleration, it's not as harsh nor is it as harsh for daily IMO. The slight less resistance from the larger diameter piping seems to smooth things out.

Personally, I'd go 3". Sets you up for down the road, it's a bit smoother tone-wise and the cost difference is minimal.

John,
The best way for me to answer your question, is to have you look at Jeff's new blog post that also has a dyno graph as well!

http://blog.perrinperformance.com/3-...ults-and-tune/

Let me know if you have any further questions :happyanim:

As I mentioned, there is virtually no difference. 5whp is not noticeable in any way, I understand you have to advertise this as they are gains, but you can't advertise this (not saying that you are/you did) as any significant gains (on an un-tuned car).

However, as I've mentioned all along, the standard trio of intake, exhaust and tune proves to be the winner here (like always). The 3" exhaust components with a 3" intake and tune are the only way you'll see a difference. 30whp is a nice increase, there's no doubt.

A few other thoughts:
-I find the 3" is a smoother sounding exhaust (despite having slightly louder overall volume). This would be my choice just for that aspect.
-3" is a great option to leave you open for further mods down the road (FI)

Ultimately, trying to squeeze out 2-3whp here and there on a budget is completely useless. You gotta pay to play. $3100 for 30whp on these cars in N/A format, ouch. But, I think this 3" option is the way to go because FI will be the only way to make any noticeable power, and FI will require a 3" setup (especially turbo).

Using a 2.5" versus 3" on a turbo system, big difference (especially with a test pipe). I gained 38whp/28wtq on my car going from the OEM 2.25" to 3" exhaust (not an FA20).

Overall, very nice results on the stage 3. :thumbsup:

3" ftw. I love mine.

Been waiting to see that post for a long time now. Thanks.

Isn't it a common practice to use 2.5" pipes for up to 300hp, then go larger to 3" if you have more? I remember seeing a clip about this on Horsepower TV once. Anyone?

.ck

I think I saw your White FRS in San Leandro last week on my way back home from work haha. I'm also considering getting a Perrin Catback, but I'm probably going to go with a M7 T-Titanium simply due to it's JDM nature (lol), looks (there's actually titanium), and zero drone during cruising speeds + orgasmic sound once WOT.

@PERRIN

So a car with an intake, catback and no tune.

Would it be safe to assume there would be a loss/zero gain of hp/torque had your test car not have been tuned?

Absolutely the parts gain power without a tune!

We choose to show off the 3.0" system with a tune as we feel that this is the natural progression for the customer. They buy an exhaust, buy an intake, and finally buy a tune. We want to show that the 3.0" system will make the most power when the customer gets to that final stage.

As we have shown before, the bolt ons add power without a tune. Here is the 2.5" catback system with NO tune.

http://blogperrinperformance.com/wp-...ktestfinal.jpg

Showing the HP gains using the same ECU tune between runs shows that the 3.0" system makes more power than the 2.5" system. That is the important thing to take note of. This shows if there was a stock tune on the car, that it would be same thing, the 3.0" system would make more power.

http://blog.perrinperformance.com/wp...drbkstkint.jpg

Above is an example of the same tune used and just the header back exhaust was changed. The stock ECU tuning isn't so limiting that the 3.0" exhaust won't gain power over the 2.5" system. Our goal with showing these graphs is just to prove the 3.0" system doesn't lose power but gains power over the 2.5" system.

well, that settles that then. 3" does in fact make power over a 2.5" NA. good.

dont mean to thread jack but.. i just installed my perrin catback and it sounds
awesome. but...... how can i adjust it to make it even. my driver side sticks out
more than my passenger side.

My drivers side sticks out about .5-.75" more as well. I'm ignoring it at the moment.

Yea my driver side is out more than passenger side , how to make it even?

Diy help please!!!

i had a similar problem but the perrin guys helped me fix it. Rotate the s pipe after the resonator and before the muffler to get it to work out better. I was also a dumbass and didn't take off the stock gasket.

Looks good now though.

And yes, i got the 3" because it is more refined of a sound. Its really damn good.

Loosen the two V bands on the S pipe, the connection to the mid pipe, and the connection to the muffler.

Then twist the S pipe to move the muffler to the desired location, then retighten the V bands, and you are done!

Hope that helps guys! Also, keep in mind, if you ever have any questions about any of our parts, you're always more than welcome to shoot us a PM or give us a call! :happyanim:

Shame the 3" Front Pipe is discontinued :(

-PB

Ill sell you mine for $5K

K
K
K
K
K

I'll pm you the shipping address :)

@PERRIN_Mladen

Is the 3" still made to order or do you have it on the shelf?

I'm going to assume you are asking about the 3" catback, if that is that case, then I've got them on the shelf and ready to go.

5 WHP is a big difference IMO. 1-2 isnt, but 5 whp is enough of a difference to make someone choose this exhaust over the 2.5 inch system. It may not be a lot or enough to feel the difference but a couple whp here and there on mods will add up and you will feel the difference after you get a whole set up together. Its a no brainer to get the 3 inch system after Perrins recently blog posts. If you dont like the sound of the 3 inch then get the 2.5 inch.

Can I send my 2.5 back and get some credit for 3.0? :D

'

You wouldn't feel 5whp whatsoever. It would barely make a difference in the performance of your car....by itself.

As you said, multiple mods adding 3-5whp here and there, definitely makes a difference.

I personally would get the 3" because it sounds better IMO

Same boat... I ordered the 3 inch front pipe, and will be switching out the 2.5 inch catback down the road... is there any sort of trade in possibly? Anything we can do other than post it in the classifieds to sell it... then order the 3.0? Maybe people that ordered the 2.5 inch directly from Perrin's website can get some special coupon code to use when they purchase the 3.0 from Perrin's website?

I'm sorry, but I do not think that trading in the exhaust will be a possible thing ;).

However, I will help you out when you do decide order the 3" exhaust from us. Just shoot me a PM and I will see what I can do for you guys. :happyanim:

I have the 3" (turbo'ed car) and it's by far the best sounding 4 cyl exhaust I've ever heard. It's really pretty amazing. Very mature sound. And my god when that turbo spools up, it's incredible. Still pretty quiet, but just a beautiful noise. No farts or droning whatsoever either. I couldn't be happier with it.

Since we've installed both 3" res and non-res systems here (great product btw Perrin!) we made a video to have you guys hear the difference. Both cars are stock header/overpipe/front pipe.

[ame]http://youtu.be/pwhCWSwi4mo[/ame]

Would going the resonated catback with a catted header and resonated front pipe be over kill.? Would it be better to have a resonater in the front pipe or cat back?

Love the sound of the Perrin 3 inch resonated C/B

Going to order one soon, RallySportDirect still had a 3 inch front pipe in stock from Perrin so I ordered that today, wanted to get one before they were all gone

Alright, I see that @BRZtoni made a new thread about this and got an answer from @PERRIN_Mladen, but I wanted to make sure that @KSpider and @speedyracer got the answer, too!

Loosen the two v-bands on the S pipe, the connection to the mid pipe, and the connection to the muffler.

Then twist the S pipe to move the muffler to the desired location, then re-tighten the V bands, and you are done!

Hope that helps!

They finally let me post.. my very first post by the way. :w00t:

Ok, I like the sound of the white car. This white one has Perrin 3" cat-back resonated with everything esle stock?

Who has the best deal and how much shipped to 95630? Since I am new I am not sure if they allow me to receive PMs. If not, please email to typer1407@sbcglobal.net.

Thanks.