Welcome
....I'm just curious, and somebody else mentioned it before, if you had 65k to dump on a used gtr, you bought your Z for 20K, why not just use the 45k for to TT now instead of later?? as for the affordable kits, I believe (and correct me if I'm wrong) but BP Single turbo might be the "cheapest" so far with great gains....btw it makes no sense to compare a modded car to a stock car, mod both cars and compare them later or compare both cars stock for stock, guarantee you the Z is way better that your vw stock, mod the Z and it will be better as well.... btw what are the other 6 cars you have??