Mega Sale! Save 22% on the AUTOOL Automotive Engine Intake Pipe Valve Clean Machine Valvetronic System Walnut Powder Sand Carbon Deposition Cleaner by AUTOOL at Daily News Detroit. MPN: MR000993094992. Hurry! Limited time offer. Offer valid only while supplies last. Why need clean carbon deposition? Carbon deposition will decrease air-fuel ratio, cut down engine output power, increase fuel consumption, engine drastic shake on idle status...all the thing will hurt engine deeply. So normally we should clean carbon deposition after every 40000-50000 kilometer trip What is walnut powder(sand)? Crash walnut shell into powder, after a vigorous selection process then we get walnut sand. It show high performance in the three area: hardness, anti-pressure,
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