Overlooked your post Ryu. I was originally worried about the spool but after driving with this 37r, the lag is not nearly as bad as I thought it would be and definitely worth the wait by the time the wastegate opens up. The .63 back housing should really make a big difference as well. The motor still makes good power out of boost. I usually take it easy driving around town and between the lights but I like to enjoy what its got at the on ramps and cruising the interstate. Thanks for the luck!