I have an off-road H-pipe too, but mine's still on there. Just in case some cop gets curious and thinks I'm running something illegal underhood, at least I can show him the pump (yes they are like that around here, even though there's no testing). If nothing else, it'll help the resale of it later. I know if I were to buy another Mustang, I'd be looking for stuff like that. It'd make me wonder what else has been done. Moral of the story: a LOT of work for about 1-2 horsepower. Just my .02
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Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch