flint54 Posted January 7, 2011 Share 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? Link to comment Share on other sites More sharing options...
johnnyc Posted January 7, 2011 Share 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. Link to comment Share on other sites More sharing options...
TrailReadyMJ Posted January 7, 2011 Share 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. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now