I have a pair of Glenwood log manifolds with risers for a 455 Olds. The risers are modified to accept 4" exhaust hose. The stainless tips are mitre cut and have internal rubber flappers. (one is missing) Two pieces of 4" soft wall exhaust hose about 13 inches long and 8 4" stainless hose clamps. Any takers? Make me an offer I cant refuse. Trade for BBF stuff ?