I've had good luck with KB stuff. He just says everything is worth .2/2mph and if that was the case we would all be running 4's in the 1/4.
His ram-air kit seems good until mid 12's really. I pulled off the canister and the car picked up about 2mph doing back to back runs.
We have one of his 9/11 Converters in my friends car and it works well. ~3200 stall, spools up the 60-1 Stage V turbo just fine.
We also ran a MK1TXB cam in my friends car and other than beeing a bit noisy the car ran well with it. (TA-61, 55# inj, 9/11)
His chips are old technology, go with a good Jay Carter chip.