Ive got the D and D bolt ons. got the bike in july 02 and the pipes august 02. Heed this advice: they are the loudest, raspiest bolt ons ive heard on a busa yet. Good or Bad, your choice! Most of the gearheads i meet love it. I do too. 2 things you need to do with them:
First order of business: get the PAIR mod. 2-3000 miles and your bike will be backfiring like crazy(actually AFTERFIRING, but we'll call it backfiring cuz thats the common term). Its embarrassing and not good for your ride. The backfiring isnt as prominent at first, but gets worse and worse and WORSE the longer you go without the pair mod on D and D's. Im not sure if its as big a problem with other brand pipes. 6 inch torch-like flames out the pipes aint good for anything on the bike! Check out Brock Davidson's kit. a bit pricey for what you get, but ITS MADE SPECIFICALLY FOR IT! Top notch finish and instructions, in my book. No screwing around with your own home brew machined parts!
Second: I know with my 02, I needed a Power Commander III. The low RPM stutters and surges SUCKED. The pipes F with the efi map BIG TIME. From about 2000-4500RPM in low gears like 1st or 2nd, low speed riding sucked and took a surgeons touch to be smooth in traffic. I had a custom map built when i bought the Commander because they discounted the dyno time since i bought the unit off the shop. But I have also downloaded and run the D and D map provided by Power Commander and it seemed pretty damned smooth. Great if you just want more streetablity and dont want to spend $200-300 for custom dynoing.
The total for all this crap plus the pipe is kinda steep after all is said and done but its a SWEET sounding pipe and worth 2-3 more horses. Thats my $0.02...well, kind of a long post....maybe $0.03!
