the one thing i like about thunderbike is they are a factory dealer,with a dyno who test and test over and over to see what gives them the best results,the guys race bikes as well, so have a sound knowledge of what does and doesnt work,also i havent seen a lot of other pipe manafacturers dynoing their products and posting the results on there websites
p.s. they are also working on a twin r3 style headlight conversion for our bikes if anyones keen on that look
