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Hey, I'm looking at some 550cc injectors to go with my hi flowed R33 turbo. Will the stock ecu rechipped run these well?? Will 550cc be too big ??

Also I'm getting a walbro fuel pump, will I need a aftermarket regulator as well or will the fuel pump and 550cc injectors be ok.

Current mods are basic stage 1 ie FMIC, Exhaust, EBC.

Cheers, I'm only after about 200rwkws so will standard injectors with the walbro and aftermarket regulator get me there? The R33 turbo is being rebuilt with ball bearings and steel wheels etc so that should be fine for this power.

Yes I have my eye out for some GTR injectors but these 550cc second hand ones I've seen are only slightly more expensive than GTR ones.

440cc GTR injectors will be more than enough, they will also drop straight in

Save the little extra money and get the GTR injectors then spend some extra money and get them cleaned and flowed to make sure they are 100% working and won't leak or die once installed on the car

I also suggest new o rings

You will also need to factor in a resistor pack as the standard RB20 injectors are top feed high impedance and the GTR and most others are top feed low impedance

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