Our documentation show that the only h-pipe equipped 1971 "B" body cars were the 426 hemi powered applications. However, we have had customers call and order h-pipes for their 71 440 powered cars claiming that they wanted to replace the original h-pipe that was still on the vehicle. Parts manuals list a right and left headpipe only for these 440 cars so if anyone shows a parts manual that lists an h-pipe we would like to see it. Like the old saying goes "never say never with Mopar".