Holden V8 304 355 5.0L EFI VN-VT Hydraulic Camshaft 204/214@50

Holden V8 304/355 5.0L EFI VN-VT Hydraulic Camshaft — 204/214 @.050”

Designed specifically for EFI VN-VT Holden V8 engines, this hydraulic camshaft delivers a meaningful mid-range kick without sacrificing smooth idle. The dual-pattern profile is optimized for LPG fueling, giving you confident throttle response and tractable power across cruising and acceleration. It’s a purpose-built upgrade that keeps street manners intact while unlocking improved mid-range torque.

Key benefits at a glance

• Dual-pattern profile crafted to enhance mid-range torque while maintaining a smooth, stable idle
• Designed for VPS EFI VN-VT heads—ensures proper valve timing and reliable operation on the intended platform
• Gas-friendly (LPG) performance with tuned intake/exhaust characteristics
• No stall required and tuning is recommended to maximize power potential
• Hydraulic lifter design for reduced maintenance and consistent lift across operating temperatures

What it does and how it behaves

This camshaft targets a practical street RPM band with a broad, usable torque curve from 1700 to 4700 RPM. The advertised duration is 268° intake / 288° exhaust, providing robust airflow at mid RPM while preserving smooth idle. At.050” lift, durations are 204° intake / 214° exhaust, aligning with a healthy mid-range surge without compromising drivability. Lobe separation is 112°, contributing to a stable idle and balanced valve events.

Specifications you can trust

• RPM range: 1700–4700
• Part number: 4666
• Duration (advertised): IN 268°, EX 288°
• Duration @.050” lift: IN 204°, EX 214°
• Lobe Sep Angle: 112°
• Lash (hot): IN.459", EX.486"
• Cam type: HYD (Hydraulic)
• Must use performance springs and performance retainers

Fitment and use

Compatible with EFI VN-VT Holden V8 heads only. It’s tailored for mid-range aggression with LPG in mind, offering improved throttle response and stronger pulling power in daily driving conditions. Expect a refined idle and a more confident mid-range surge after proper engine tuning.

Installation notes

• Engine platform: Holden V8 304/355 5.0L EFI (VN-VT) with VN-VT EFI heads
• Requires tuning for optimal performance (no stall required)
• Use recommended performance springs and retainers to ensure correct valve train geometry