Engine noise after header install? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

JW843 · 01-27-2016, 08:02 PM

So i just installed a Borla UEL header and that while the UEL sounds great from the exhaust (Invidia N1 catback), i'm hearing a lot of noise coming from the engine area. It's a bit of a raspy, air-y, type rattle. it almost sounds like intake sound but to the rhythm of the UEL rumble, however i'm on stock intake. Am i just crazy and noticing this or could i potentially have an issue? It's most noticeable when giving throttle at low RPM's (2-3k ish).

I could just be paranoid, or it could be normal. I've really only heard the UEL on WRX's and such so typically there's a bit of turbo sound along with it, however to me this does not seem normal. I'm also running the Invidia N1 catback.

Any ideas?

mav1178 · 01-27-2016, 08:07 PM

Of course there would be more noise.. it's thin-walled tubular manifolds without heat shields. Stock are thicker with a substantial heat shield.

-alex

jawn · 01-27-2016, 08:14 PM

The wooshy noise is normal.

JW843 · 01-27-2016, 08:16 PM

Well that's good news. Thanks for the information.

B-R-Z · 01-27-2016, 09:03 PM

This is normal and has been covered many times. This is a result of the thinner metal of the aftermarket header which doesn't 'hide' the air flowing sound as well as the factory header does. You are fine.

_gt86_user · 01-27-2016, 11:16 PM

Had the noise when I ran an OFH, now have a Tomei UEL and haven't heard it. My guess is because the Tomei is the same thickness as the factory manifold? even when I heard it with the OFH it was very feint.

Icecreamtruk · 01-28-2016, 11:52 AM

As everyone else said, its the header which is thinner (ligther as well as a consequence) that doesnt mask the sound. The Tomei is a very thick header so it does not have the same sound.

DJCarbine · 01-28-2016, 09:47 PM

I had the same with my borla and revworks.
When wrapped the revworks quieted down a lot, unsure of long term durability of wrap but I suppose I will see.

86 South Africa · 01-29-2016, 12:29 AM

I also wondered if my header had a leak or something... just takes a bit of getting used to. Mine were leak tested etc when installed so I know they're fine - and after driving a bit I love the new sound (I just have header and OP - not the rest of the exhaust yet, so ALL my noise comes from the front)

01-27-2016, 08:02 PM	#1
JW843 Member Join Date: Mar 2015 Drives: 2013 BRZ Limited Location: Charleston, SC Posts: 40 Thanks: 3 Thanked 3 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Engine noise after header install? So i just installed a Borla UEL header and that while the UEL sounds great from the exhaust (Invidia N1 catback), i'm hearing a lot of noise coming from the engine area. It's a bit of a raspy, air-y, type rattle. it almost sounds like intake sound but to the rhythm of the UEL rumble, however i'm on stock intake. Am i just crazy and noticing this or could i potentially have an issue? It's most noticeable when giving throttle at low RPM's (2-3k ish). I could just be paranoid, or it could be normal. I've really only heard the UEL on WRX's and such so typically there's a bit of turbo sound along with it, however to me this does not seem normal. I'm also running the Invidia N1 catback. Any ideas?

01-28-2016, 09:47 PM	#8
DJCarbine Thupercharged Join Date: Mar 2013 Drives: 2013 FR-S Location: La Grange Park, IL. Posts: 1,501 Thanks: 116 Thanked 751 Times in 439 Posts Mentioned: 23 Post(s) Tagged: 0 Thread(s)	I had the same with my borla and revworks. When wrapped the revworks quieted down a lot, unsure of long term durability of wrap but I suppose I will see. __________________ 2013 FRS Vortech V3 11psi Revworks UEL - PLM Overpipe - MOTIV catted frontpipe - Invidia Q300 2019 Series.Grey STI - Stage1+ SF

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01-27-2016, 08:07 PM	#2
mav1178 Senior Member Join Date: Apr 2013 Drives: 2005 Toyota Camry Location: 91745 Posts: 6,562 Thanks: 493 Thanked 6,093 Times in 3,029 Posts Mentioned: 95 Post(s) Tagged: 3 Thread(s)	Of course there would be more noise.. it's thin-walled tubular manifolds without heat shields. Stock are thicker with a substantial heat shield. -alex

01-27-2016, 08:14 PM	#3
jawn Senior Member Join Date: Jun 2015 Drives: 2015 CWP BRZ Limited Location: NOVA Posts: 2,800 Thanks: 1,801 Thanked 3,946 Times in 1,757 Posts Mentioned: 105 Post(s) Tagged: 7 Thread(s)	The wooshy noise is normal.

01-27-2016, 08:16 PM	#4
JW843 Member Join Date: Mar 2015 Drives: 2013 BRZ Limited Location: Charleston, SC Posts: 40 Thanks: 3 Thanked 3 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Well that's good news. Thanks for the information.

01-27-2016, 11:16 PM	#6
_gt86_user Inactive Join Date: Mar 2015 Drives: . Location: . Posts: 289 Thanks: 40 Thanked 84 Times in 65 Posts Mentioned: 0 Post(s) Tagged: 1 Thread(s)	Had the noise when I ran an OFH, now have a Tomei UEL and haven't heard it. My guess is because the Tomei is the same thickness as the factory manifold? even when I heard it with the OFH it was very feint.

01-28-2016, 11:52 AM	#7
Icecreamtruk Senior Member Join Date: Dec 2015 Drives: Track preped NA FRS Location: Montreal, Canada Posts: 987 Thanks: 1,056 Thanked 680 Times in 405 Posts Mentioned: 12 Post(s) Tagged: 0 Thread(s)	As everyone else said, its the header which is thinner (ligther as well as a consequence) that doesnt mask the sound. The Tomei is a very thick header so it does not have the same sound.

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