RPM Big Mouth Cat Delete Bypass, Mid Race Pipe For Can-Am X3 Stop choking your turbo and unleash maximum performance with the RPM SXS Can-Am X3 Cat Bypass Mid-Pipe! Unlike other options on the market that taper down to a restrictive 2" neck, the RPM Cat Bypass features a smooth, large inner transition that delivers an unrestricted true 2.5" diameter ALL THE WAY THROUGH! The stock header—and even most competitor pipes—start at 2.5" but choke exhaust flow right before the muffler connection. We completely eliminated that bottleneck. To seal this massive airflow increase, our mid-pipe includes a custom replacement gasket designed specifically for the expanded 2.5" flange. Crafted from 100% TIG-welded 304 stainless steel, removing the restrictive factory catalytic converter nets an impressive 6–7 wheel horsepower gain on the stock tune alone while drastically lowering radiant engine bay heat. Best of all, no ECU tuning is required, and it installs seamlessly using all OEM brackets, factory heat shields, and stock-style muffler connections. Features: True 2.5" Full-Bore Piping: Completely eliminates the restrictive factory 2" neck-down taper for maximum exhaust velocity. Dyno-Proven