Originally Posted by mikeinva
Alot of testing was done on many pipes by me and some friends of mine over the years in all truth the arrow wont hang with any of the top systems out there.Preds or domi pipes make more power then the arrow and the 2into1 makes more hp then them.I have seen gains of as much as 10 hp with the d&d 2into1s on the bigger motors.There tt race pipes allso make good power but are way to low to the ground.The only down side to the d&d 2into1 is they dont sound as good as some of the other pipes.I run the new 2into2 full system on my bike now they look and sound much better but the 2into1 makes about 5 more hp then the full system 2into2 on my 1087.
What makes the d&d race pipes work is bigger header and better bends that flow way better.The highest hp dyno run so far on these motors with out a turbo was done with the d&d 2into1.
Thanks for your reply, do the d&d 2into 1 come in brushed stainless
Finish,i am not a keen fan of the black finish.
Why would ya give up 5 hp with the 2 into2 ?
Purely for sound and that ya make enough hp already?