Heavy Vehicle Modifications

Omega are Authorized Heavy Vehicle Modifiers and Authorized Heavy Vehicle Officers in WA. This means that our engineers can sign off modifications pertaining to the following V6 modification codes:

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A1 - Engine substitution
A2 - Air cleaner substitution or additional fitting
A3 - Turbocharger installation
A4 - Exhaust system alteration
B1 - Transmission substitution or additional fitting
C1 - Tail shaft alterations
D1 - Rear axle installation
D2 - Differential substitution
D3 - Fitting of non-standard rear wheel components
E1 - Front axle installation
E2 - Steering alteration
E3 - Fitting of non-standard front wheel components
F1 - Suspension substitution
F2 - Trailer suspension modifications
G1 - Relocation of air brake components
G2 - Installation of trailer braking controls
G3 - Trailer brake system upgrade
G6 - Fitting of air operated accessoriesG7 - Brake system substitution / wheelbase extension
G8 - Trailer brake system upgrade (design)
H1 - Wheelbase extension outside OEM options
H2 - Wheelbase reduction outside OEM options
H3 - Wheelbase alterations within OEM options
H4 - Chassis alteration
J1 - Body mounting
J2 - Fitting of truck-bus body (design)
J3 - Fitting of roll-over or falling object protection system (design)
J4 - Tipper Bodies (design)
K1 - Seating capacity alteration, seat, seatbelt and anchorage installation
K2 - Certification of seat and of seatbelt anchorage
K3 - Cabin conversion
M1 - Fuel system alterations
P1 - Towbar and coupling installation other than fifth wheels and kingpins
P2 - Fifth wheel and kingpin installation
R1 - Installation of vehicle mounted lifting systems
R2 - Wheelchair loader installation
S1 - GVM/GCM re-rating
S2 - GVM re-rating (design)
S3 - GCM re-rating (design)
S7 - ATM/GTM re-rating
S11 - Road train trailer rating
S12 - ATM/GTM re-rating (design)
T1 - Tow trucks (construction)
T2 - Tow trucks (design)

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Much of this work is completed out of Perth and Darwin (where Omega has fixed workshops).

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However, what most people don't know is this: modifications associated with these mod codes can be signed off and accepted nationwide. This means that one of our engineers can come to you to complete the inspection and testing of your vehicle and then provide you with your HV Modification Certificate and HV Modification Plate. Your vehicle does not need to be registered in WA for this to occur.

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The process works like this:

1. Advise an Omega engineer what the modifications are to your vehicle, and what you would like to have approved (this usually involves a phone call and an email).

2. One of our Engineers will review your changes and advise what the costs are for certification.

3. An appropriate date is set for the inspection to occur.

4. You pay your deposit for the service.

5. One of our Engineers travels to your location, conducts all of the inspections and tests and then issues you with your approvals and HV Mod Plate.

6. You then take your approval documents and vehicle to your local inspection station to have the details recorded on your State's system (or the national system in the case of federally registered vehicles).

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Please get in touch with Omega to find out more.

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Out most popular requests are for heavy vehicle upgrades:

 - GVM Upgrades to Silverado - 2500 (5.8T), F350 (5.95T), RAMs and now Tundras. Costs for these services start form $3,990.