Borla 40086 Xr-1 Sportsman Xr-1 Sportsman Racing Muffler – 3.5′ Center Inlet/ 3.5′ Center Outlet 5′ Round X 15′ Long Body 20′ Overall Length. Universal Part. Reversible Design.

Borla Xr-1 Raceline Products Are The Choice Of Today’S Hottest Drag And Oval Track Racers. Featuring A Patented Uninterrupted-Flow Design And Multi-Core Technology, Borla’S Xr-1 Mufflers Actually Outflow A Straight Piece Of Pipe In Repeated Testing. Xr-1 Race Products Are Lightweight And Constructed Of High Quality Austenitic Stainless Steel For Track-Tough Durability. They Meet The Strictest Noise Requirements And Use Sound-Absorbing Stainless Steel Packing To Protect Against Burnout. Hands Down, Borla’S Xr-1 Raceline Offers The Best Balance Of Sound And Power. This Muffler Has An Inlet Diameter And Outlet Diameter Of 3.5 Inches Each And A Case Size Of 15 Inches.