Atomic Barra Valve Springs Stage 1-5 | Matched Sets

Atomic Barra Heavy Duty Retainers - Black

Atomic Titanium Retainer Set (24) – Ford Barra DOHC 6-Cyl

Load image into Gallery viewer, Atomic Barra Valve Springs Stage 1-5 | Matched Sets

Load image into Gallery viewer, Atomic Barra Heavy Duty Retainers - Black

Load image into Gallery viewer, Atomic Titanium Retainer Set (24) – Ford Barra DOHC 6-Cyl

Atomic Barra Valve Springs

Name: Atomic Barra Valve Springs
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 Matched Valve Springs

Ovate Wire Technology* | Precision Matched Sets

The Problem

Factory valve springs are designed for standard RPM and low boost. As you increase power, valve float becomes the enemy. But simply installing "stiffer" springs isn't enough—if those springs vary in pressure, they create uneven harmonics that can destroy your engine.

💡 DID YOU KNOW?

Unequal spring pressure kills timing systems. Just like mismatched injectors cause rough idle, mismatched springs cause "jerky" resistance on the camshaft. This uneven load whips straight down the timing chain, in some cases timed badly enough that it snaps guides and stretches chains. That's why Atomic springs are bench tested and matched to +/- 1lb.

The Atomic Solution

We treat valve springs like precision instruments. Every single Atomic spring is individually bench-tested and grouped into matched sets. Using advanced Ovate Wire technology*, we can achieve higher lift and pressure in a smaller package, ensuring your valvetrain remains stable from idle to 8000+ RPM.

Matched sets ensure even loading across the entire valvetrain.

Choose Your Stage

Select the correct spring pressure for your boost and RPM goals.

Stage 1

Pressure: 80-90lbs

Max Boost: 20psi max

Stage 2

Pressure: 90-100lbs

Max Boost: 25psi max

*Ovate Wire

Stage 3
(Most popular)

Pressure: 100-110lbs

Max Boost: 35psi max

*Ovate Wire

Stage 4

Pressure: ~125lbs

Max Boost: 35+ psi

*Ovate Wire

Stage 5

Pressure: ~145lbs

Max Boost: 35+ psi

*Ovate Wire

*Stage 1 springs do not utilize ovate wire technology.

Tech Specs

Material: High-Tensile Wire (Ovate on Stage 2-5)
Matching Tolerance: +/- 1lb (Bench Tested)
Compatibility: Works with Factory, Titanium, or Chromoly Retainers
Application: Ford Barra DOHC 4.0L (BA-FGX)

⚠️ Installation Notes

Check Installed Height: Always verify installed height during assembly to ensure correct seat pressure.
Lifter Preload: High-pressure springs (Stage 3+) may require checking lifter bleed-down rates or preload adjustments.
Timing Chain Load: Upgrading valve springs increases the load on your timing chain by up to 40%. We strongly recommend installing an Atomic Heavy Duty Timing Chain Kit alongside these springs to prevent failure.

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