i was thinking about picking up a a2 off of my local forum..the guy says that you need another transmission case and new second gear..how much would this be if i was to buy it? he wants 1500 for the motor and trans, shifter cables and box, also the prb and prc ecu..the motor also needs the serpintine belt tensioner and water pump..is this worth it?

 

K20A2's are 197 hp standard, dependant on what HP you've already got, you could look at it in the sense that,

1500 dollars is a cheap modification for a good amount of BHP if you're currently standard, but the good thing about that is, the majority of your current modifications if you have any will fit onto the new engine.

Tranmissions cases for K20's are around £100.00 in the uk, possibly $200 dollars at the most? I dont know about that. Gears are easy to fit, and shouldn't cost you much at all, however a new second gear from the shop might be expensive.

With the ECU, you'll also need your keys to be recoded to the immobiliser etc,

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It's only really worth it if you plan to keep the car for a long time.