I just recieved my promoto billet endcap and spark arrestor. The stinger appears to be about half the length of my stock exhaust and a little larger in diameter. I am wondering if this alters the power characteristics (running without spark arrestor). I know exhaust pipe lengths and diameter are carfully choosen. I think this different end cap will change things. What have you experienced? PS. The quality of workmanship is great. I am very impressed with the machining.