I just had the Works Stealthworks muffler installed on my IX. This muffler is the stock muffler internally modified to flow straight through. First off for those wondering, the sound difference from stock is virtually undetectable and the performance gains claimed (9 hp) seem to be accurate. A day after the install I noticed that the bottom of the muffler is not parallel to the bottom of the bumper; it's tilted at about a 30 degree angle. The exhaust tip is centered but the angle of the muffler doesn't look correct to me. I'm assuming that the bottom of the stock muffler is parallel to the bottom of the bumper, but I'm not sure. If anyone could help me out here I'd appreciate it, thanks!

 

Stock is tilted in the same manner.

 

^Yep...what he said.

 

Ditto.