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optimized dome geometry
these seals resist high-temperature degradation and maintain consistent compression over extended engine operation
1:1 compression ratio are engineered for aggressive forced induction and high-boost applications
Wiseco K20/24 87
sophisticated crown architecture
5.5mm Viton Valve Stem Seal Set for Honda K Series (Exhaust) Supertech:Default Title optimized dome geometrySupertech's 5. 5mm Viton valve stem seal set delivers OEM quality sealing for Honda K series exhaust valves. Constructed from premium Viton material, these seals resist high temperature degradation and maintain consistent compression over extended engine operation. The precise 5. 5mm diameter ensures proper fitment on K series cylinder heads without modification. Ideal for rebuilds, performance upgrades, or preventative maintenance on K20, K24, and
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