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I have my golf Upsoluted and I have the N75J valve fitted in reverse. The valve controls the wastegate and spools the turbo up earlier than it would with the standard valve. I fitted it in reverse because it seems to work better that way, it brings the boost in earlier and holds it on for longer. Fitting this valve will give you slightly more power in your car as you are getting the boost earlier.

Best thing to do is put it in the right way, go for a drive, then take it out and put it in reverse and go for a drive again. See if you notice a differnce in reverse. Different engine codes give slightly different results with wee things like this.

Bought my N75J from and i think it was ?35

hope this helps

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