Uprated Valve Stem Seals – Z20LEH / Z20LET

Upgraded valve stem seals designed specifically for the Vauxhall Astra VXR Z20LEH and related Z20 series engines.

These seals solve the common factory oil consumption issue, offering far greater heat resistance and oil control — proven in high-performance and rebuilt engines up to 600+bhp.

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Features:

✅ High-temp Viton material for superior oil sealing

✅ Precision-machined for OE fit and reliability

✅ Ideal for performance, rebuilds, and turbo conversions

✅ Tested and used in all UNA Performance engine builds with zero failures

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Fitment:

Z20LEH – Astra VXR

Z20LET – Astra G / Zafira GSi

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Recommended For:

✔️ Engine rebuilds or upgrades

✔️ Smoky start-ups or oil burning issues

✔️ High-boost / forged engine setups

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💡 Note: Always replace valve stem seals when rebuilding a head or changing valve springs for consistent long-term performance.