Justin517

almost liek a gurgle-rattle
its only happened to me 3 or so times in the past year, and i know tanman said he gets it with his custom magnaflow. magnaflow and borla are similar design muffler, anyone?

Chimpzilla

i believe there is a fix for it also, but im not sure what it is. do a search.

Clues

This condition occurs when the underside of the exhaust piping gets hit with water/snow/slush and results in the extreme cooling and contracting of the stainless steel only on the underside of the pipes. This causes the pies to bend or arc slightly which can make the pipes come into contact with the chasis. The noise differs from rattles/vibrartions/gurgles depending on where contact is made with the chasis. A good exhaust shop can usually diagnose the problem and make the appropriate adjustments to the brackets.

BTW, if you have a Tip with an old version of the Borla downpipe, you are missing a key bracket that supports the downpipe and flex joint.

mAd1(gt3071r)

For a while I thought it was their flex pipe setup. I noticed that's where most of my sound came from. Didn't think it was that common though.

TANMAN

Very nice to know.

TomRitt (Homebrewed)

I got that noise, not very often though

S7

My opinion is that the pipe expands and slightly touches the car.

Silv3rMoto

it's very common...

[Arawan]

it used to do it more often when it was newer, but it still happens from time to time in the rain. it's a kind of scary noise when it happens. scary enough where i lay off the gas and upshift (higher gear/less torque appear to help quiet it down) until the sound goes away. i had always attributed it to a section of the exhaust expanding when hit by water, as others have mentioned here.

CK:1.8T+Rabbitâ„¢

Really? Mine has never done that.