a few questions about a hx40
 

hey guys
so i found a legit holset hx40 for sale for 150bucks. the guy says its a 19cm housing, twin scroll t4 all v-band turbo. It has the 8 blade wheel. does that sound right?? how would i install this on my 24 valve? i have a 4 inch downpipe. and before i install it im gunna buy a aftermarket exhaust manifold too. im on a budget right now,and besides my stocker has an oil leak. and what do people mean when they say to pin it?
thanks for any input and advice!!!