flint54 Posted January 7, 2011 Posted January 7, 2011 The down pipe on my original, never molested, exhaust has a very large dimple just below the manifold. Looks like it was smacked with a hammer. Puzzled, I went to the JY to find another and EVERY ONE has the same "feature". Any thoughts on why this apparent flow restriction exists? Any reason why I shouldn't try to drive a mandrel into it and make it round (other than the obvious getting it stuck)? Or should I just not care about this?
johnnyc Posted January 7, 2011 Posted January 7, 2011 Yeah, that's a factory dimple. I've heard people say that it's for driveshaft clearance. I had the local muffler shop make me a new one when I put my Borla header on.
TrailReadyMJ Posted January 7, 2011 Posted January 7, 2011 Yeah, that's a factory dimple. I've heard people say that it's for driveshaft clearance. :agree: The driveshaft/yoke get pretty close to the pipe on compression, especially when under full flex. This is with stock suspension of course, although even with a lift it can get pretty close depending on your setup.
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