hes going to want more air flow if he starts doing stuff like reeds/pipes/etc though. D&D bullseyes work wonders, I can speak for them. I threw 4 in my sled and noticed a HUGE jump in power. According to MBRP the setup I have without the bullseyes I was gettin .5-1HP out of the silencer, with the bullseyes I'm supposed to be getting 6-8 from the silencer and D&D says an additional 2-3 from the increased air flow for combustion. Dunno specifically about those specs as far as truth, just going by what they told me, but i DID notice a HUGE difference in everything throughout the entire range of the sled.