I got this set of HTG twin pipes with my IQR chassis when I bought it. I was told these will fit the 700 and 800 Big Block motor for this chassis. I cannot verify these will fit since I dont have a Big Block motor in the sled, but they seem to have the right shape for that chassis. Pipes are a little rusty, but overall good shape. Includes twin pipes, stingers and flanges. Looking to get $150 OBO + shipping.