The Big Brother To The 2.5" E-Valve Transform the quiet stock sound of your X3 SxS to the mean sound of the 3 cylinder Rotax at the push of a button! RPM SxS has incorporated a high end fully electronic 3" exhaust valve motor into our famous Big Mouth cat delete AND built it to 3" to do just that! You now have everything the famous RPM SxS Big Mouth has WITH a 3" electronic dump valve! RPM SxS has maintained 3" all the way through the e-valve system and 2.5" at the muffler by utilizing a custom exhaust gasket that mates to a stock muffler! This allows you to have the most free flowing mid pipe on the market and still be able to mate it to ANY muffler that accepts the stock mid pipe! This Stainless, TIG welded Cat Bypass frees up the absolute most HP and substantially lowers temperature radiating from the exhaust system. Any restriction, especially the stock catalytic converter after the turbo, directly reduce horsepower. The Big Mouth features alone will net you 6-7 wheel horsepower with the stock tune and valve closed. OEM, or our RPM Powersports slip on muffler fits straight to this cat delete E-valve system with NO modifications! The 3" E-Valve gives you the option to run a stock muffle