Overpipe knocking? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Shaun Perry · 03-22-2014, 10:49 PM

Is anyone else on the forum running the Agency Power Overpipe/Frontpipe slip in unit?

After installing, I started hearing and feeling "knocking". noticeable mostly when accelerating in 1st gear; either while turning from a dead stop(for example, making a U-turn) or accelerating hard from a dead stop.

Took the car to my local exhaust shop and saw that the overpipe itself was touching the cross-member shield that rides upward between the engine block and strut tower.

The technician loosened the flange between the over pipe and front pipe then temporarily, put a bar in there to separate the touching metal, gave it a few pushes to open up a gap, let the pipes cool down, bolted and tightened everything back and then removed the bar.

It made a noticeable gap of space and the OP was now free of touching anything. It helped for about a day or so but now I'm hearing the knocking again.

Running OEM Headers and OEM midpipe still btw.

Sorry for the novel, trying to be as detailed as possible.

Any ideas or help/advice would be appreciated.

Thanks in advance.

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s2d4 · 03-22-2014, 11:06 PM

Replace it with a better quality piece.

Shaun Perry · 03-22-2014, 11:15 PM

Awesome input lol very helpful

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s2d4 · 03-22-2014, 11:27 PM

Quote:

Originally Posted by Shaun Perry

Awesome input lol very helpful

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What kind of input would you like?
Eliminate the problem or mask the problem?

Shaun Perry · 03-22-2014, 11:31 PM

I was more looking for someone to chime in who has or has had a similar issue. Unless you would like to purchase me new parts, I like to see if I can take it upon myself to fix the issue first before giving up

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s2d4 · 03-22-2014, 11:33 PM

Quote:

Originally Posted by Shaun Perry

I was more looking for someone to chime in who has or has had a similar issue. Unless you would like to purchase me new parts, I like to see if I can take it upon myself to fix the issue first before giving up

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The issue is bad quality product.

Wrap it may help but it isn't fixing the issue.
Can't you return it citing bad figment?

Shaun Perry · 03-22-2014, 11:35 PM

Not entirely, I took it off a friend used. Who had no issues with it while on his car, although he was running an aftermarket header. Maybe that is what's needed, which sucks to know even though they claim the part works with oem headers.

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whathedunk · 03-25-2014, 02:59 PM

Quote:

Originally Posted by Shaun Perry

Not entirely, I took it off a friend used. Who had no issues with it while on his car, although he was running an aftermarket header. Maybe that is what's needed, which sucks to know even though they claim the part works with oem headers.

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I have UEL headers for sale

BigFatFlip · 03-25-2014, 03:17 PM

Joking aside, maybe the problem is in the fitment. I'm having trouble picturing it, but I would try to loosen up all the other pieces and see if you can adjust any of them to get any extra room, although I'm positive your exhaust shop would have tried that already.

chutrain · 03-25-2014, 07:35 PM

Are you sure it is just hitting the cross member? I had mine hitting the swaybar.

Shaun Perry · 03-26-2014, 11:41 AM

Quote:

Originally Posted by BigFatFlip

Joking aside, maybe the problem is in the fitment. I'm having trouble picturing it, but I would try to loosen up all the other pieces and see if you can adjust any of them to get any extra room, although I'm positive your exhaust shop would have tried that already.

He did loosen up one section but I'm debating whether to go back and just have loosen everything else like you said and see if he can fix it like that.

Should have taken pictures when I was under there with the car on his lift lol.

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Shaun Perry · 03-26-2014, 11:42 AM

Quote:

Originally Posted by chutrain

Are you sure it is just hitting the cross member? I had mine hitting the swaybar.

It's just an assumption from witness marks on the over pipe and cross member.

How did you know it was hitting your sway?

And just to clarify you were also running oem headers + agency power over pipe & front pipe?

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Kelbyat07 · 03-26-2014, 11:43 AM

Quote:

Originally Posted by whathedunk

I have UEL headers for sale

What are you selling bro?!

OP- That sounds weird, did you have your friend check it out since he didn't have any issues with his?

kiichiro · 03-26-2014, 01:07 PM

Motor mounts

03-22-2014, 10:49 PM	#1
Shaun Perry Senior Member Join Date: Aug 2013 Drives: 2013 Scion FR-S Whiteout Location: Nor-Cal Posts: 302 Thanks: 28 Thanked 93 Times in 68 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	Overpipe knocking? Is anyone else on the forum running the Agency Power Overpipe/Frontpipe slip in unit? After installing, I started hearing and feeling "knocking". noticeable mostly when accelerating in 1st gear; either while turning from a dead stop(for example, making a U-turn) or accelerating hard from a dead stop. Took the car to my local exhaust shop and saw that the overpipe itself was touching the cross-member shield that rides upward between the engine block and strut tower. The technician loosened the flange between the over pipe and front pipe then temporarily, put a bar in there to separate the touching metal, gave it a few pushes to open up a gap, let the pipes cool down, bolted and tightened everything back and then removed the bar. It made a noticeable gap of space and the OP was now free of touching anything. It helped for about a day or so but now I'm hearing the knocking again. Running OEM Headers and OEM midpipe still btw. Sorry for the novel, trying to be as detailed as possible. Any ideas or help/advice would be appreciated. Thanks in advance. Sent from my iPhone using Tapatalk __________________ SBD Turbo V2 \| OFT Flexfuel Kit; Tuned by Shiv @10psi \| Nameless 2.5in. 1-piece OP/FP \| Full Custom Center Exit/SS dual tip cat-back exhaust \| KateCOOL Oil Cooler \| Mishimoto T-Stat sandwhich plate \| ACT XT Street Clutch Kit; 10.5lb flywheel \| RSR Black-i Coilovers \| Rota Torque 17x9 +30 \| Bayson R front lip/side skirts/rear spats and rear windshield visor

03-22-2014, 11:06 PM	#2
s2d4 Senior Member Join Date: Mar 2013 Drives: R32 GTR, AW11 MR2 SC, GTS86 R Location: OZ Posts: 2,615 Thanks: 603 Thanked 1,223 Times in 708 Posts Mentioned: 35 Post(s) Tagged: 0 Thread(s)	Replace it with a better quality piece. __________________

03-22-2014, 11:15 PM	#3
Shaun Perry Senior Member Join Date: Aug 2013 Drives: 2013 Scion FR-S Whiteout Location: Nor-Cal Posts: 302 Thanks: 28 Thanked 93 Times in 68 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	Awesome input lol very helpful Sent from my iPhone using Tapatalk __________________ SBD Turbo V2 \| OFT Flexfuel Kit; Tuned by Shiv @10psi \| Nameless 2.5in. 1-piece OP/FP \| Full Custom Center Exit/SS dual tip cat-back exhaust \| KateCOOL Oil Cooler \| Mishimoto T-Stat sandwhich plate \| ACT XT Street Clutch Kit; 10.5lb flywheel \| RSR Black-i Coilovers \| Rota Torque 17x9 +30 \| Bayson R front lip/side skirts/rear spats and rear windshield visor

03-22-2014, 11:31 PM	#5
Shaun Perry Senior Member Join Date: Aug 2013 Drives: 2013 Scion FR-S Whiteout Location: Nor-Cal Posts: 302 Thanks: 28 Thanked 93 Times in 68 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	I was more looking for someone to chime in who has or has had a similar issue. Unless you would like to purchase me new parts, I like to see if I can take it upon myself to fix the issue first before giving up Sent from my iPhone using Tapatalk __________________ SBD Turbo V2 \| OFT Flexfuel Kit; Tuned by Shiv @10psi \| Nameless 2.5in. 1-piece OP/FP \| Full Custom Center Exit/SS dual tip cat-back exhaust \| KateCOOL Oil Cooler \| Mishimoto T-Stat sandwhich plate \| ACT XT Street Clutch Kit; 10.5lb flywheel \| RSR Black-i Coilovers \| Rota Torque 17x9 +30 \| Bayson R front lip/side skirts/rear spats and rear windshield visor

03-22-2014, 11:35 PM	#7
Shaun Perry Senior Member Join Date: Aug 2013 Drives: 2013 Scion FR-S Whiteout Location: Nor-Cal Posts: 302 Thanks: 28 Thanked 93 Times in 68 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	Not entirely, I took it off a friend used. Who had no issues with it while on his car, although he was running an aftermarket header. Maybe that is what's needed, which sucks to know even though they claim the part works with oem headers. Sent from my iPhone using Tapatalk __________________ SBD Turbo V2 \| OFT Flexfuel Kit; Tuned by Shiv @10psi \| Nameless 2.5in. 1-piece OP/FP \| Full Custom Center Exit/SS dual tip cat-back exhaust \| KateCOOL Oil Cooler \| Mishimoto T-Stat sandwhich plate \| ACT XT Street Clutch Kit; 10.5lb flywheel \| RSR Black-i Coilovers \| Rota Torque 17x9 +30 \| Bayson R front lip/side skirts/rear spats and rear windshield visor

03-25-2014, 03:17 PM	#9
BigFatFlip sleep, drive, eat, repeat Join Date: Mar 2012 Drives: '13 BRZ, '12 Outback Location: Sack of Potatoes Posts: 4,431 Thanks: 2,630 Thanked 3,796 Times in 1,981 Posts Mentioned: 188 Post(s) Tagged: 4 Thread(s)	Joking aside, maybe the problem is in the fitment. I'm having trouble picturing it, but I would try to loosen up all the other pieces and see if you can adjust any of them to get any extra room, although I'm positive your exhaust shop would have tried that already.

03-26-2014, 01:07 PM	#14
kiichiro corolla specs/GTR looks Join Date: May 2013 Drives: ooh oooh pretty tail lights Location: slower than a accord V6 Posts: 490 Thanks: 229 Thanked 113 Times in 79 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Motor mounts __________________ SOLD THEM BOTH Hers: 2007 987S Mine: 2012 991S That was fun, thanks Hachi

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