The M-DT is designed with a more conservative Oval design rather than the common Canister style universal mufflers. These are more discreet to law enforcment and although the feature the same perforated-core design as the Canister mufflers that we sell, they offer a deeper more mellow tone due to the increased amount of packing that is contained within the muffler casing. Fitment Information Requires welding and fabrication for fitment.  We have tested this to fit on our personal 2006 E91 325xi Touring Wagon with perfect fitment.  Sound is deep. BMW E90 Sedan or E91 Wagon Non Turbo, non 335i For E90 or E91 with single side exhaust Emissions Compliance This exhaust does not alter, replace, or modify any emissions equipment. Specs & Features Dual 3" stainless steel tips, 2.5" inlet Polished or Matte Black with Silver Chrome finish tips Sound is quiet and deep tone Universal 1 year limited warranty Total Length: 23 3/8" long Total Height: 4 3/4" Inlet ID: 2.4" Outlet ID: 2.9" Dual Tip Length: 7.0" Dual Tip Width: 6 1/4" Canister Length: 14 5/8" Canister Width: 9.0" Redline360 is an authorized Megan Racing dealer and sells only genuine and authentic Megan Racing Products.