QR Code Link to This Post Original Muffler for Slingshot 2.4 GM Ecotec. Approx 6,000 miles. W/Catalytic converter and the 3 bolts to mount to header. Has 4 ea. 7/8" dia. holes to help engine breath better. Could be plugged if too loud for you. I have the original Manifold also. Call or text Louie at 612-281- two nine nine six. Let's block ads! (Why?)