I did nothing to mine... just matched it to the 3-transfer case, slapped on a 4-petal malossi intake and a 20phbg, with a ninja G2, and i'm hittin' mid low 50's on my TSM. still tuning tho, and changin' out the variator here soon, so.. yeah :D
They go pretty good. couple guys in seattle have been runnin' 'em, and they seem to be able to take quite a bit of abuse...