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Throttle valve set TwinAirFaster and smoother throttle response where it is needed most.The precision machined sleeve built into the throttle body venturi reduces the diameter and accelerates the speed of the air-fuel mixture.Simply add the thinner butterfly valve and shaft to get faster, smoother throttle response for the low and mid range.For better throttle response (throttle position 90% to 100% open), use the larger kit throttle valve without the sleeve.
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