Atomic Barra Valve Springs Stage 1-5 | Matched Sets

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SKU: 306800

Atomic Barra Valve Springs Stage 1-5 | Matched Sets

Name: Atomic Barra Valve Springs Stage 1-5 | Matched Sets
Brand: Atomic Performance Products
SKU: 306800
Price: 400.0 AUD
Availability: InStock

$400.00 AUD

Sale Sold out

Tax included.

Stage 1 | 80-90lbs | 20psi max Sold out

Stage 2 | 90-100lbs | 25psi max | Ovate wire Sold out

Stage 3 | 100-110lbs | 35psi max | Ovate wire Sold out

Stage 4 | ~125lbs | 35+ psi | Ovate wire Sold out

Stage 5 | ~145lbs | 35+ psi | Ovate wire Sold out

Quantity must be 1 or more

Atomic Performance Valve Springs – Stage 1-5 | Ford Barra DOHC | Ovate Wire

Description:
Built for boosted Barra street and strip engines, the Atomic Performance Valve Springs are engineered to deliver reliable valve control at a variety of engine power levels and RPM ranges.

We test every spring one by one and group them into very closely matched sets. Think of it like flow matching injectors. Each time the cam pushes against a spring the motor slows down a bit. If every spring is the same, the ECU will be able to smoothly set the idle. If each spring varies the idle RPM varies more, that creates more noise and vibration and a less smooth RPM signal.

Stage 1	Suits fairly standard engines up to around 600hp
Stage 2	Suits built motor, upgraded turbo, higher compression, or high revving motors up to ~800hp
Stage 3	Suits motors that are streetable and pushing towards 1000hp
Stage 4	Suits motors similar to stage 3 but with larger valves or HD rockers
Stage 5	Suits 1200+ hp motors that rev hard, have extra valvetrain weight and issues with exhaust back pressure.

✅ Key Features:

✅ Suits Ford Barra DOHC 4.0L 6-cylinder engines
✅ Options to handle 2000+hp
✅ Designed for street, strip, and dyno performance builds
✅ Ovate wire design for increased lift range and spring life
✅ Compatible with factory or upgraded retainers (Titanium/Chromoly)

🛠️ Why Choose Atomic Springs?

✔️ Delivers excellent valve control without excessive seat pressure
✔️ Supports high boost without valve float or lifter instability
✔️ Ideal for performance camshafts and tough street engines
✔️ Ovate wire provides better spring dynamics in limited space

✔️ Every single spring has been bench tested and grouped into batchs of +/- 1LBS
✔️ A perfect match for titanium or chromoly retainers

📦 What’s Included:

Set of 24 Stage 4 performance valve springs
Suits all Barra DOHC cylinder heads (OEM and aftermarket)