I bought a 71GTQ kit last year and I was having problems with overboosting prior to my crankwalk failure. Since the car is going under the knife now, I emailed them about my problem. They were willing to send me a new spring which they think wouldn't solve my problem or replace my HKS wastegate for a Tial 44mm + cash. Willing to replace my 1 year old wastegate is what I call customer service. Keep it up. You guys rock!