Actually, our engine (as it comes from Isuzu) can handle substantially more than the 4- pounds of boost IF an ECU modification can be made and an extra injector added. But the bigger weak link in the driveline is the tranny which cannot handle much more than the SC currently puts out. I am in the process of having my 4L30E rebuilt and beefed up as much as possible and will have to see what it is capable of.

Please ask around as there are quite a few of us running them and most have not trouble letting you drive it - there is no comparison with a stock VX and is THE best mod I have done and enjoy it daily getting on the freeway, pushing through the twisties, or crawling over rocks.