Atomic Barra Weld On Rocker Cover Fitting Kit
Engineering Overview
SPEC-DOC
Atomic "Stealth" Breather Fitting System
Is your Barra a bit blocked up?
High-horsepower Barra engines need massive crankcase ventilation to prevent blown seals, but welding on fittings often means hacking up your engine cover or ruining the clean OEM look of your engine bay.
The Atomic Solution
The Atomic "Stealth" System. This is the only weld-on solution designed specifically to fit perfectly under the standard plastic garnish while delivering massive -10AN flow.
2. The Jig-Locating System
We removed the guesswork. Every kit includes our proprietary positioning jigs that lock into existing rocker cover features.
- Precision Placement: The jigs bolt or clip into factory holes, holding the weld-on bung in the exact coordinate needed.
- Foolproof Welding: Simply install the jig, drop in the aluminium bung, tack weld, remove the jig, and finish welding.
- FG Dual Jig: Includes separate jigs for Front and Rear fittings.
- BA/BF Single Jig: Includes a jig for the critical rear fitting (front is positioned visually).
3. Atomic x Speedflow Engineering
This isn't an off-the-shelf adapter. We partnered with Speedflow to engineer a bespoke extension fitting specifically for this application.
- Part Number: Z-MC-920-10-L-BLK
- Custom Low-Profile Design: Shorter than a standard extension, critical for clearing the garnish. Slim enough to fit the rocker cover garnish without cutting*
- Seamless Integration: Designed to mate perfectly with our -10AN ORB weld-on bungs.
- Australian Made: Manufactured to the same high standards as your engine.
Choose Your Kit
DIY Kit (Standard)
Ideal for: One-off engine builds.
- 2x -10AN ORB Weld-On Bungs
- 2x Atomic/Speedflow Extension Fittings
- 1x Set of Plastic Positioning Jigs
Trade Master Kit
Ideal for: Fabrication workshops.
- 5x Sets of Fittings & Extensions
- 1x Set of Billet Aluminium Jigs
- Reusable for Life
Refill Kit
Ideal for: Repeat builds (Jig owners).
- 2x -10AN ORB Weld-On Bungs
- 2x Atomic/Speedflow Extension Fittings
- (No Jigs Included)
Tech Specs
Application: Ford Barra (BA, BF, FG variants available)
Material: 6061-T6 Aluminium (Fittings) / PLA (DIY Jigs)
Fitting Size: -10AN ORB
*BA/BF Note: Requires drilling down the factory breather tower for rear fitting clearance. This can be done using a large drill bit ~12mm to create a larger breather hole and flat welding surface.
Application Specifics
For FG Series (Dual Jig System)
The Process: Includes 2x Positioning Jigs that bolt into existing holes on the cover. They lock the weld-on fittings in place for tacking.
No Cutting: The custom Speedflow fittings sit perfectly under the standard plastic cover position—no cutting of the plastic garnish required.
For BA/BF Series (Single Jig System)
The Process: Includes 1x Positioning Jig for the critical rear fitting. The front fitting has ample clearance and can be positioned visually.
Note: Requires milling or drilling down the factory breather tower (easily done with a ~12mm drill bit) to create a flat surface and larger vent hole.
*Note that the rear of the plastic cover will be raised approx 2mm.
⚠️ Important Notes
- CLEAN INTERNAL BAFFLES OF ROCKER COVER THOROUGHLY BEFORE RE-INSTALLATION ON ENGINE.
- Debris Warning: Drilling and welding on engine parts causes engine-destroying debris. You are responsible for inspecting, cleaning, and properly installing these parts and any other parts involved in this modification.
- Warranty: No warranty given beyond parts provided.
- Fitment: BA and BF plastic covers will sit approx 2mm higher than factory at the rear.
