IDK if just the silencers will change anything dramatically, I'll let someone else chime in. Learn to do a plugchop to dial in your main jets. Look up FASTOYS, he has the link in his signature. If you have not yet purchased the silencers, I'd hold off. Scrounge around on here; there are alot of good deals on used pipes/silencers, as well a a new air filter setup to let that baby breathe!