harley davidson jets

if you are looking to make noise ..drag pipes do the trick.. at the cost of horsepower.
the best combo i have found is h-d 's screamin eagle slip on mufflers, with screaming eagle air cleaner , and a dyna jet kit for the carb, dyna jet gives you a better spring rate for the carb slide and needles and jets..
i put this exact setup on my 99 twin cam 88 dyna glide, out of the crate it ran 13.60 ..with these mods it ran12.90s in the quarter mile...with a best time of 12.79... the power increase was enough to make me put in the screaming clutch pressure plate a week later.... plus it still sounds like it is suppose to. a bit louder but no power loss........ by the way a bigger carb is not the way to go either, been there too.