[surfbeast]

I purchased a used T/B and plenum on E-Bay also and polished the plenum and T/B to a mirror finish. I also noticed that the inside of the plenum was really rough and had lots of slag hanging in it. I ported it as much as the tools I had allowed and polished it out. I put an intake spacer in ( $ 15, what the hell.. if it helps it helps) and hopefully the port job helped out. With all the rough edges and drag caused in the thing it had to help. Best of all it was free except for the cost of the dremel bits and my time. I polished my old plenum and sold it for $75 bucks! only pais $25 for the used one with the T/B!