Khrome Werks 1860-0621 Perforate Performance Insert for 4.5” HP-Plus Mufflers ( 202708P )

Khrome Werks 202708P Performance Inserts for 4.5″ Khrome Werks Harley Touring Slip-Ons

PURPOSE BUILT FOR MELLOW SOUND AND DOWN LOW PERFORMANCE. 2.25” OD RAMP CORE WITH EASY BOLT-IN FLANGE. MAINTAINS A DEEP NOTE WITHOUT HIGH PITCHED FREQUENCIES. IMPROVED TORQUE AT THE HIT OF THE THROTTLE. A TRUE BUILDER'S CHOICE!

This insert does the best at recovering torque curves without a loss in high end HP. It does tend to quiet the exhaust down a bit but for the most part, these will be used in higher performance applications such as 124 and 128 big bore bikes that would be ultra loud to begin with.