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Thor88

Help Identifying Possible Exhaust Leak

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Hello all,

I have a 93 GTR that has recently begun making a fluttering noise under load that sounds like a loud exhaust leak or something caught in a fan.

The sound is coming from the passenger side of the vehicle near the turbos and is only noticeable at higher revs.

It has no affect on performance, holds/builds boost normally, etc.

My first guess was a gasket from turbo elbow to down pipe, but the sound is still there with down pipes removed.

Vehicle is stock other than Apexi intake and Nismo down pipe.

I have searched but have been unable to find anything referencing a similar sound given that there is no affect on how the vehicle is running.

Any help narrowing down where the noise may be coming from would be greatly appreciated.

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Manifold gasket? Tried tightening the nuts/bolts?

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Manifold/turbo was my next guess, but I would have expected that to result in some change to performance/boost, the sound is quite loud which would signify a fairly large leak.

 

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