If you take yor quad to a dealer or cycle shop and have them get the parts and do the work? Your looking at (all est.) $350 for just pipe and installation (HMF), Jetting about $200 parts and labor. So some were over $500 would be my guess. If you do it, pipe is like $240 and warrior power kit is $100, thats Dynojet jets and K&N filter. Do it yourself. It's easy.