Sorry to hear you have this problem, yes you will need a restrictor ring, 1/1.1/1.2 bar, traders on here sell them, if memory serves, ideally you willalso need an uprated fuel pump ((walbro) a good condition ic, cooler spark plugs, fcd & a cat back exhaust, I'm assuming you have some of these already.
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Sorry to hear you have this problem, yes you will need a restrictor ring, 1/1.1/1.2 bar, traders on here sell them, if memory serves, ideally you willalso need an uprated fuel pump ((walbro) a good condition ic, cooler spark plugs, fcd & a cat back exhaust, I'm assuming you have some of these already.