Upgrade your Volkswagen hydraulic lifter 8v engine with Supertech’s black nitride-coated intake valves. Forged from enhanced EV8 (21-4N) stainless steel, these +1.0mm valves feature a one-piece non-magnetic design, hardened wafer tip, and a triple-groove lock setup for maximum strength and longevity under extreme conditions.
Precision-machined with an undercut stem, back-cut head, and Superfinish-polished stems, these valves deliver lower friction, better sealing, and improved airflow—ideal for high-performance builds, from street to track. The black nitride coating enhances surface hardness while preserving the valve’s ductile core to resist fatigue and carbon buildup.
Specs:
- Head Diameter: 41.00mm (+1.0mm oversize)
- Length: 98.60mm
- Stem Diameter: 6.97mm
- Groove Type: Triple Groove
- Material: EV8 (21-4N) Stainless Steel
- Coating: Black Nitride
- Hardness: 52 HRC min (tip)
- Must use keepers: KPR-6S/7 (2 per valve)
Vehicle Fitment:
- VW Golf, Jetta, Cabriolet, Corrado, Beetle, Scirocco (1985–2004)
- Audi 4000, 80, 90 (1985–1990)
- Passat, Eurovan, Fox, Quantum, and others using 1.8L and 2.0L 8V engines with hydraulic heads.
