The N75J is on one of the takeoffs on the TIP, the N75 has three takeoffs, one into the TIP, another to the N75 takeoff on your intercooler and the final one to the wastegate.
Funnily enough last night I was fitting it, didnt realise it went in backwards and had to ring prawn to confirm and ended up tracing the N75 to the coolant bottle. F'ing stupid arrangement of confusing wires. I was never any good at those kids games where you have to see which fisherman caught the fish either.
You do feel it boosting more, and it 'feels' faster but from known point to known point it doesnt seem to be faster, maybe it is by half a car length or something. I took the telemetry box out the car as well and theres no way I'm wiring that all back in and I cant find the car charger.
As said, as mine seems to run low boost in comparison to Prawns, and mine definately overfuels, I thought I could maybe get away with it.
That said, I intended to order a normal N75 but clicked on the wrong link so its lucky it worked!