Supertech Performance Bronze Exhaust Valve Guides for the Honda - Acura K Series (K20 & K24) Engines
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Supertech Performance Bronze Exhaust Valve Guides for the Honda / Acura K Series (K20 & K24) Engines GDE-HK55-E - Supertech Performance Exhaust Valve Guide Honda / Acura K20 K20A K20A2 K20A3 K20Z1 K20Z3 K24A2 K24A4 K24A8 Fitment. Precision-machined from High Quality Manganese Bronze material. These guides in combination with our low friction Black Nitride Valves provides the best solution for performance and durability. Exhaust guides for high powered engines that need a better thermal transfer coefficient, We use a Copper Alloy. Copper has about 3 times higher thermal transfer than Manganese Bronze.