PRODUCT DETAILS
Supertech 5.5mm Viton Valve Stem Seal Set for Honda K Series
Give your VTEC a fresh seal of confidence. The Supertech 5.5mm Viton Valve Stem Seal Set for Honda K Series keeps oil where it belongs even when your K20 or K24 is spinning past 9,000 rpm or gulping down ethanol-rich fuels. Each seal is molded from genuine DuPont Viton that shrugs off 400 °F cylinder-head temps, race-gas additives, turbo heat-soak, and daily-driver stop-and-go abuse.
Why it matters
- Zero oil creep – Tight, 5.5 mm bore tolerances and a tensioned garter spring stop oil from sneaking past the valve guides, eliminating blue-smoke start-ups and oil-fouled plugs.
- Longer guide life – Micro-polished sealing lips meter the perfect film of oil to the valve stem, preventing metal-on-metal wear without starving the upper valvetrain.
- Built for boost & big cam lift – Viton retains elasticity far beyond conventional rubber, so seals stay planted during high vacuum, positive manifold pressure, and aggressive cam profiles.
- Track-to-street reliability – Proven in endurance racing, yet a direct drop-in for stock heads on everything from RSX Type-S autocross builds to Accord daily drivers.
Engineered precision
Supertech CNC-machines the internal metal jacket, then laser-etches every seal for lot traceability—you know exactly what’s keeping your K-series oil-tight.
Vehicle Coverage
Acura CSX / Integra / RSX / TSX • Honda Accord • Civic & Civic Si (incl. EG, EK, EP, FG, FN) • Civic del Sol • CR-V • CRX • Element • Prelude • S2000 and other 5.5 mm-stem Honda K-series cylinder heads.
Variants
- SPT-VS-H5.5I-8 – Intake, set of 8
- SPT-VS-H5.5E-8 – Exhaust, set of 8
Installation Snapshot
Skill level – Intermediate (spring compressor required) | Time – 2–3 hrs with head removed | Included hardware – 8 Viton seals & metal jackets | Tune/Cutting – None; no machining needed