Exhaust Front Pipe vibrating 1500-1800 RPM - Borla

[PSUGOLD]

I had an exhaust leak a couple of months ago in my front pipe sections at the flex joint which was causing vibrations around 2200 RPM. Borla sent new front pipes which I had installed at a local shop, problem seemed fixed for a while. Now I am getting similar vibrations around 1500-1800 RPM. If I rev the car in P and sit around 1800 RPM, you can feel the wheel shaking a bit and if you are under the car, you can see the front pipe vibrating. Cold starts are rough now too. At 2000 RPM, it stops until it drops back down again. Took it back in today, we checked all the clamps, loosened them all, repositioned em, tightened and torqued. Front pipe connection to the manifold was snug too. Everything was tight, no leaks, nothing. Vibration still there. Nothing on the exhaust seems to be rubbing, the heat shields are not loose or vibrating either.

Any ideas what may be causing this, or do other have similar issues?

Thanks

[14S4GWM]

Seems a little early but not sure how much vibes from a bad motor mount.

[PSUGOLD]

Seems a little early but not sure how much vibes from a bad motor mount.

Mechanic checked motor mounts too, no issues. Engine wasn't moving at all when the shaking was occurring too. Only thing vibrating were the front pipes, rest of the exhaust was fine too. Odd and frustrating.

[ModItNow]

I have Borla too but never experienced any issues like this. Interesting that the issue came back, do you think a cat could be going bad?


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[creativecody]

I had his same thing happen with my AWE exhaust. Vibration was shaking the center console when decelerating in he 1800rpm range. It was the screw to the clamps on the exhaust hitting the heat shield under the car. Have the clamps turned so the ends of the screws aren't pointing towards the heat shield.

[PSUGOLD]

I had his same thing happen with my AWE exhaust. Vibration was shaking the center console when decelerating in he 1800rpm range. It was the screw to the clamps on the exhaust hitting the heat shield under the car. Have the clamps turned so the ends of the screws aren't pointing towards the heat shield.

We did that yesterday. All the clamps were turned away. You can physically see the front pipe section of the exhaust vibrating at that RPM range though, so something is causing just that section to vibrate, and only at the 1500-1800 RPM range now. Probably not a big deal, but more annoying than anything else, at least so far.

ModItNow...not sure about the cats, would that cause the vibration like that just at the certain RPM level?? All other signs do not point to that though, it runs fine besides the vibration. Fuel economy the same. No codes.

[BDP]

I've got a similar issue on my car with AWE touring exhaust and resonated downpipes. My issue is exactly where the downpipes mate to the rest of the exhaust. It's leaking like a son of bitch there and the backpressure from deceleration always causes vibrations in the lower rpms. It also makes the exhaust sound like crap under acceleration. I've tightened the hell out of the clamp and added the provided paste. I also get no codes, the only sign of the issue is the black soot on the exhaust in that area.

I bought two of these from Jegs a few weeks back and haven't had time to install them yet to see if it helps. It's flipping crazy a 2k exhaust has the issues like I'm having with the AWE exhaust.

http://www.jegs.com/i/JEGS-Performan...30732/10002/-1

[PSUGOLD]

I've got a similar issue on my car with AWE touring exhaust and resonated downpipes. My issue is exactly where the downpipes mate to the rest of the exhaust. It's leaking like a son of bitch there and the backpressure from deceleration always causes vibrations in the lower rpms. It also makes the exhaust sound like crap under acceleration. I've tightened the hell out of the clamp and added the provided paste. I also get no codes, the only sign of the issue is the black soot on the exhaust in that area.

I bought two of these from Jegs a few weeks back and haven't had time to install them yet to see if it helps. It's flipping crazy a 2k exhaust has the issues like I'm having with the AWE exhaust.

http://www.jegs.com/i/JEGS-Performan...30732/10002/-1

Let me know how the clamps work and if it fixes the issue. I do have some black soot too around the clamps, but i've had that a while now. These damn vibrations came back after being gone when new front pipes were installed, now they are back.

[BDP]

Let me know how the clamps work and if it fixes the issue. I do have some black soot too around the clamps, but i've had that a while now. These damn vibrations came back after being gone when new front pipes were installed, now they are back.

Mine went away also for a short time, after I re-positioned the exhaust on a lift and took some power tools to the clamps. That lasted about one month...maybe two and it started up again. There was a lot of visible black soot at the flange but after re-loosing the clamp and pushing the pipes together more and re-tightening...it didn't seem to help and still leaks.

I plan on trying those clamps out this weekend hoping it will provide enough of a seal to get rid of the problem.

[Captain Tuttle]

Guys - sorry to hear of the troubles with the exhaust systems. I agree at these price points, both the Borla and AWE shouldn't have these issues. Would welding each of the joints solve the problem? Is replacing each of the clamps with full welds even an option?

[ModItNow]

We did that yesterday. All the clamps were turned away. You can physically see the front pipe section of the exhaust vibrating at that RPM range though, so something is causing just that section to vibrate, and only at the 1500-1800 RPM range now. Probably not a big deal, but more annoying than anything else, at least so far.

ModItNow...not sure about the cats, would that cause the vibration like that just at the certain RPM level?? All other signs do not point to that though, it runs fine besides the vibration. Fuel economy the same. No codes.

Just a very strange issue, didn't want to rule out any possibilities..


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[PSUGOLD]

Guys - sorry to hear of the troubles with the exhaust systems. I agree at these price points, both the Borla and AWE shouldn't have these issues. Would welding each of the joints solve the problem? Is replacing each of the clamps with full welds even an option?

I don't want to weld anything, but it could be an option. I have had this exhaust for 2 years though, and never had the vibrating front pipes until recently which is odd. Clamps all were refitted and tight, no leaks, yet the damn front pipes vibrate at that certain RPM. Never had this for the first 2 years either, and the front pipes are new after the originals were leaking and vibrating recently.

[PSUGOLD]

Well, Borla got back to me today and said they are going to send me out another set of front pipes. The new pipes installed 6 weeks ago replaced the original ones that were leaking. The vibration totally stopped, until about 2 weeks ago. Same symptoms. They are sending me out another set and I will see if that fixes the issue once and for all, if the pipes were causing the problem all along. It was fixed for a month after the new ones were installed, so maybe something went wrong with them already...we shall see!

[Bikel]

Interesting that my STaSIS touring system with resonated downpipes of 4 yrs has just recently started with the same strange vibration issues at 16-1800 rpms. Can't really determine where the vibration is coming from, but it sure sounds like all the interior panels are conducting a symphony! Checked the exhaust underneath and no viable leaks or clamps appear to be rubbing. This is baffling as it took over 50K miles to transpire. But here we are! Welcome any thoughts back here...

[Acejam]

Don't forget - a V6 is one of the most unbalanced engines out there. I have an AWE touring setup, but my car can be idling and my passenger seat will visibly shake occasionally. Completely normal.

[SportVier]

I get this with an AWE system. Sounds and feels like the exhaust hitting the under body while engine braking right around 1600-1800 RPM. Looked it over closely and nothing on the exhaust seems to be coming close, no leaking, and all the clamps are tight. This is after resolving another issue where the exhaust was hitting the spare tire well. I was thinking the issue might actually be an engine or transmission mount, but haven't checked out that angle yet.

[david borla]

Interesting that my STaSIS touring system with resonated downpipes of 4 yrs has just recently started with the same strange vibration issues at 16-1800 rpms. Can't really determine where the vibration is coming from, but it sure sounds like all the interior panels are conducting a symphony! Checked the exhaust underneath and no viable leaks or clamps appear to be rubbing. This is baffling as it took over 50K miles to transpire. But here we are! Welcome any thoughts back here...

Please send me an email at [email protected] so I can help resolve this issue. Thanks.