If it's a stock engine AND you don't plan on doing any further mods, then go with a Toomey kit. Blaster with a Toomey pipe(plus the air filter/vents supplied) will put you about 1-2 quadlengths behind a 400ex(with 14 tooth front sprocket)......not bad for just a pipe. I love my LRD, but for a stock motor, I'd probably go with a Toomey....especially if it's your preference for sound and all that garbage.