There may be as many different types of exhaust tips as there are final tours for superannuated rock groups. Consider this list of classics. Single. Dual. Triple. Quadruple. Square. Round. Oval Tapered to trumpet. Mellow to megaphone. You can even get tips in the shape of the Chevrolet "bow tie". (What will they think of next?) And here's the best part, you can always get what you want. Just call, check the net, or go to your favorite parts place and you can have the beauties of your choice welded or bolted on to your ride in a flash, Jack.