Built to perform. Finished to perfection.
A snapshot of performance, fabrication and custom build work completed in-house at All GM Automotive. From tubs and exhausts through to engine conversions, tuning and fabrication, every build is tailored to the owner’s goals with a focus on fitment, function and detail.
Custom fabrication
Tubs, exhaust work, engine bay refinement and one-off fabrication solutions.
Performance upgrades
Built for drivability, reliability and real-world performance - no shortcuts.
Complete build support
Conversions, suspension, braking, tuning and finishing work completed in-house.
Featured build work
Examples of the type of fabrication, conversion and performance work we carry out in our Altona workshop.
9" Differential Conversions
Built for strength, reliability and the right fit for your setup.
Custom Tub Fabrication
Clean fabrication work tailored to the vehicle and finished properly.
Custom Exhaust Systems
Fabricated for clearance, sound, performance and a tidy finished result.
Engine Conversions
Thought-through conversion work with attention to wiring, cooling and drivability.
Suspension Upgrades
Set up to suit how the car is actually driven - street, strip or somewhere in between.
Haltech & Aftermarket Dash Integrations
Neat integration work for a clean finish and usable data on the road.
Engine Bay Refinement
Clean-up and finishing work that makes the bay look as good as the car performs.
Servicing & Maintenance
Not every job is a full build - we also keep serious cars running properly.
Forced Induction Applications
Turbo and boosted setups built with the right supporting components in mind.
Engine Builds
From freshen-ups to serious combinations, built to suit the car and the goal.
Tuning
Calibration work focused on drivability, power delivery and reliability. ECU, TCU, EGR and speedo programing.
Transmission Conversions & Brake Upgrades
The supporting work that helps bring the whole package together properly.
Talk to us about your car, your goals and the right setup.
Whether you need fabrication, performance upgrades, diagnostics or a full custom build, we can help you work out the next step.