We've installed many of them here in the shop with no problems. We install one almost every day here actually. They are just as good as the UR for a better price. ASP turned me off when I caught a couple with the timing marks not in the right spot. That was a couple years ago and it may not be a problem anymore, but it left a bad taste in my mouth after a customer had to pay for new motor because of it.
Russell Floyd Z1 Motorsports www.300zx.com 1990+ Nissan Z specialists Used Parts, New parts, Service/Repair and Performance Z1 Motorsports Exclusive Parts Line 2877 Carrollton Villa Rica Hwy Carrollton, Ga 30116 770-838-7777 770-832-9253 (fax) 
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