14-Present Silverado/Sierra 1500 4.3L/5.3L Armor Plus T409SS 3 Inch Muffler Bypass with 4 Inch OD Tip, MBRPUnleash a deeper, more enhanced tone from your truck with the MBRP S5013409, a muffler bypass and tip Kit. Designed for Chevrolet Silverado 1500 and GMC Sierra 1500 models equipped with the 4. 3L or 5. 3L engine, this kit delivers a noticeable sound upgrade without going over the top. The muffler bypass is constructed from durable T409 stainless steel, an excellent rust and corrosion resistant material and features smooth mandrel bent tubing to enable