This is a direct replacement for the stock ‘non adjustable’ 3.5 Bar unit. In other words no cutting and welding of the fuel rail and no need to make a return line all the way back to the tank. The GTT Adj. FPR will have adjustment range of 3 Bar up to 4 Bar. This is a very handy product for tweaking the overall fuelling up and down. (Closed loop fuelling unaffected)
If your injectors are a bit big for example you can reduce pressure down to 3 bar. If the injectors are a bit border line then upping the pressure will deliver more fuel. (It’s not a substitute for too small injectors, more a fine tune in). Nice & discrete too. You wouldn’t know it’s there unless you remove the fuel rail.
Articles:WHY REDUCE FUEL PRESSURE SLIGHTLY ?
Fits: Gen 1 Cooper S (also JCW / GP1)
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£139 +vat (exchange)