I purchased the poweraid spacer from the states 2 years ago,best 30minute add on for $70, then went and bored out the throttlebody,but it developed a whistleing sound so had to cut straight line down the inside of the bore to break the air flow to cure it,then added the FIPK kit,Turbo city larger thermostat housing and cooler thermostat.I am very happy with it so far,running 32" MTR's original diff ratios,still getting 450 k's out of a tank
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