well lads, i fitted a decat to the car a few months back, and it was perfect for a while, sounded great and you wouldnt even notice any sound difference while the car was idleing, but lately the exhaust has developed a kind of metalic vabrating noise at roughly 3,000rpm, and also at idle it makes a vibrating noise that almost sounds as if the exhaust is blowing slightly. Ive located the sound and its coming from the section of the exhaust behind the decat, not the baffler but the pipe around where the center mount is. Now the exhaust is nowhere near any part of the body and all joints are sealed perfectly with no blow and solid thight. All the rubber mounts are perfect also and if i shake the exhause or hit it by hand theres no noise so theres nothing inside thats doing it but if i just press on the exhaust right where the rubber mount is with the car running the noise stops straight away, so i bought a powerflex mount for the center thinking it might solve it but no difference atall. I know its just a stupid little thing but its really annoying, especially when driving around town as it can be heard fairly loud outside
Anyone ever had any problem like this with there exhaust? Would it just be a case of loosening, moving and rejoining the decat joint mabey?

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IF YOU CAN READ THIS IM STILL IN 5TH!!!

Magnex by any chance?

If it is try tapping your center box, if it sounds hollow then all the wadding will have burnt out / been blown out, needs either opening up and rewadding or a new centre section putting in.

I had this on my magnex and it sounded terible so i had a new powerflow centre section welded in. Job done.

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Cherry Red 306 HDI
Championship White Integra DC5 Type R

I have exactly the same thing on mine! So changed to a second hand powerflow system, cured it a bit but can still hear it sometimes! I think it may be something to do with cat not being oem an raising and touching the heatshield! Could your decat be doing the same?

i have the same problem, i think it is just a resonating noise, i thought the same when i put mine on, i have now heat wrapped my decat, its a little batter but not 100%

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if i dont see you in the mattress il see you in the spring

yeah thats it alright, a resonating noise, it asa if the pipe is vibrating making the noise by itself, not actually touching off anything... yeah exactly what i dislike most about it, gives people another excuse to slag the french car!!

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IF YOU CAN READ THIS IM STILL IN 5TH!!!

I get this on my standard exhaust

WHen starting from cold it rattles loads on idle and at 3000rpm

Once its warmed up i just get it at 3000rpm

All of you with vibrating sounds , check your heat shield that bolts DIRECTLY to the exhaust cam cover, mine created a noise and no one could locate it for ages

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Ex- Phase 3 China GTi-6 T-Reg

The standard silencers are far too choked. Mine chucks out foot long flames Full stainless ftw!

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Team Nile 6
Team: 40.2 MPG
5 x a 306 owner!
currently abusing type r's in a town near you ™
I truely live for the 306 ®
Build date: 29th October 1997 Wednesday's car
midweek madness

Anyone get a vibrating noise at medium to high revs after you have let off the accelerator? I'm hoping to god that its my exhaust and not my gearbox

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2005 Peugeot 206 GTI 180

2008 BMW K1200R