[rockc]

Just finished modifying my 2 1/2" ramhorns. Took the tube out and tapped the hole, then screwed bolts in both top and bottom holes and grinded them off flush with manifold. Both of mine came with the accessory flang so I had to grind that off too. The cost of these was a little over $216.00 at my local auto parts for the both of them. These were made in china. (Limited Lifetime*)The parts numbers for mine were 674-503 and 674-500. They came with the exhaust bolts and nuts. But went ahead and purchased the brass nuts.