An option for BORLA headers in race competition, our 4-into-1 Merge Collector is the only way to equal the performance of the famous BORLA XR-1® Racing Collector Muffler so dominant in NHRA Super Comp Class. Designed in conjunction with top engine builders and race teams with proprietary angles and super lightweight construction.

Engineered as a slip or weld-on collector where ultimate torque curves and maximum horsepower are desired. 2-3/8” primary tubes, 4” outlet and 15” long slip-on design weighing in at only 3.5 lbs.  Extremely durable and lightweight aircraft grade high quality austenitic Stainless Steel 4-into-1 merge design that is capable of excellent horsepower gains over standard collectors. Fully TIG welded, dyno formulated angles of reduction, fixture fabricated for exact duplication and simple exchange on BORLA (or similar designed) race headers. Dyno Tuned Proprietary Power Pyramid Internal Flow Diverter included.

Gary Stinnett, former NHRA World Champion Super Comp driver and renowned engine builder, proclaimed, “While the base horsepower numbers were impressive for the new BORLA Race Merge Collector, the ET gains at the racetrack were even more outstanding. The area under the curve and average torque gains were excellent.”

A True BORLA quality race component, and on top of everything else, every unit is fully polished! Out of the box performance, from BORLA Racing, the World’s Most Winning Exhaust.