ripleys in houston does custum manderal bending, though the stock already has 21/2 manderal pipe, with 3 resinators and 2 cats. They said theyd do 3inch manderal bend pipe for $600 . dont replace the stock manderal bend with coventioanl pipeine bend . big diff. stck pipe bend at 3 inch is like manderal bend at 2 and the stock car already has 21/2 manderal bend. the guy at ripleys said it was such a good setup he would leave it alone. He said he had never seen manderal ben on a stock car