COBRA Streetrod Slashdown 3918 Billet Slashdown tips cap off these Streetrod pipes that produce class-leading power gains. These Streetrods use large 2.5-inch, 222o heat shields that cover from the exhaust ports to the chromed billet tips for a seamless look and non-bluing finish. The chromed billet end caps are beautifully machined for show-custom look. These pipes give an overall power increase with improved rideability (made even better with the installation of the Cobra Fi2000 fuel processor--or jet kit on carbureted engines). As always with Cobra exhausts, they are easy to mount and come with all mounting hardware needed for a professional installation.