Atomic Head Stud Over Size Washer Kit – 14.3mm Oversize OD (28mm) | Ford Barra DOHC | Hardened & Precision Ground
Description:
In high-horsepower Barra builds, especially with big boost and large-frame turbos, the problem isn’t always what you think. Many assume a blown head gasket means the head has lifted or a stud has stretched — but in reality, what we’re often seeing is head crush: the alloy beneath the washer is deforming under extreme clamping force.
That’s why we developed the Atomic Oversize OD Head Stud Washer Kit — purpose-built for Ford Barra DOHC engines using M14 and 14.3mm head studs. These washers are 28mm in diameter, spreading the clamping force over a significantly greater area compared to standard 9/16” or ARP washers. This wider load distribution helps prevent head crush, ensuring your torque settings hold and your gasket seal stays intact under extreme boost pressures.
Key Features:
✅ Suits M14 and 14.3mm head studs – including Atomic and custom big-bore setups
✅ Oversized 28mm OD to cover the full top of the cylinder head boss
✅ Hardened and precision-ground for flatness and reliable torque retention
✅ Designed for Ford Barra 4.0L DOHC engines making serious power
✅ Helps prevent head gasket failure caused by head surface deformation
✅ Used in Atomic’s most extreme 1000–1800+hp engine builds
Why We Made These Washers:
✔ Factory XR6 Falcon engines use M12 head bolts – we offer M12, M14, and 14.3mm stud kits for higher clamping performance
✔ On big-power builds, the alloy head casting can crush under the washer
✔ Our oversized washers distribute load across the full head boss, protecting the casting and maintaining clamping force
✔ Helps reduce false assumptions about stud stretch – ensures reliable re-torque results
✔ No need for billet heads – this washer kit helps maximise the limits of factory castings
When you’re building a serious Barra, don’t let a small contact patch cause big problems. The Atomic M14 Oversize OD Washer Kit is a simple, proven solution that helps push the factory castings as far as they can go — reliably.
