KHROME WERKS 1861-1574 200795 Sidekick Ghost Pipe - BlackFeatures Designed to increase horsepower and torque while providing an aggressive, low frequency sound level 16 gauge HP Plus muffler with 2 1 2" inlet 1. 5" absorptive baffle with 3" reverse cone outlet to maximize torque; baffle is wrapped in stainless steel wool and high temp fiberglass for a rich, mellow tone 1 3 4" to 1 7 8" to 2" high flow 16 gauge three step primary headers with a 2 1 2" collector, 4 1 2" diameter 18 mm and 12 mm O2 bungs