Borla ATAK CrateMuffler 3'' Offset Center Oval For Chevy SBC 350/ 383/ 406 V8 1980-1984 XLH1200 Sportster Supersonic provides a superior flow

Supersonic provides a superior flow performance with the famous Supersonic sound

Over 2 MPG increase in fuel efficiency

heavy-duty track bar relocation bracket

Crossmember-back True Dual Exhaust System

and F450 trucks is the best performance upgrade you can do for the money- it gets you the best power gains

Borla ATAK CrateMuffler 3'' Offset Center Oval For Chevy SBC 350/ 383/ 406 V8 1980-1984 XLH1200 Sportster Supersonic provides a superior flowBORLA's CrateMuffler is the world's first muffler purpose built to optimize the sound & power of crate and custom built motors. The mufflers are directional. The outlet can be identified by the mounting bracket welded to the endcap. This muffler is tuned for the Chevrolet Small Block 350 383 406 CID V8 engine family. The directional design provides the aggressive ATAK sound and will dramatically reduce, or eliminate drone on specified applications.