5.5mm Viton Valve Stem Seal Set for Honda K Series (Exhaust)

Supertech'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 related variants. Supertech seals are engineered to prevent oil blow-by and reduce emissions while supporting reliable power delivery.