Volvo
FH, FM, FMX and FH16 from Euro 3 through to the current Step E digital-dashboard trucks. Full coverage of ACM1 (black), ACM2 (grey) and ACM3 modules. Both wired-in and quick-connect variants in stock.
Ask Jack about coverageBRANDS & ENGINES
Every engine family that needs a straight answer.
We've built Optima's delete and tuning coverage around the engines doing the heavy lifting in Australasian and North American fleets. If your make or model isn't listed, it's almost certainly running an engine we cover — pick up the phone and we'll confirm.
Coverage is engine-led, not badge-led
A Freightliner Cascadia, a Western Star 5700 and a Mack Granite can all be running the same Detroit Diesel DD15 under GHG17 — so if we have coverage for the engine, we have coverage for the truck. The same applies in the industrial world: a Bell B40E articulated hauler, a JCB 457 wheel loader and a Claas Xerion tractor can all share a Mercedes OM471 Stage V with ACM3 aftertreatment.
That's why the brand list matters less than the engine family and the aftertreatment ECU. Below are the brands and engines we service most often. Each group links through to the specific delete kits in our product catalogue where we have coverage in stock.
European highway trucks
The backbone of AU/NZ linehaul. We cover Euro 3 through Euro 6 with plug-and-play and quick-connect delete kits, plus ECU remapping for torque, fuel economy and engine longevity.
Scania
R, P, T, G and K series from Euro 4 onwards. Inline-6 and V8 delete kits for Euro 6 EEC3. Direct connection to the AdBlue tank plug — no wire cutting.
See a matching delete kitMAN
TGA, TGX, TGS, TGL, TGM (incl. buses) with EDC7C32. Euro 4, Euro 5, EEV and Euro 6 QC kits from 2014 on.
See a matching delete kitMercedes-Benz
Actros MP IV, MP V and MP VI, plus Atego, Axor, Arocs, Econic and Unimog. All three ACM generations (ACM2, ACM2.1, ACM3). Coach engines supported.
See a matching delete kitDAF
XF105 and CF85 Euro 4/5/EEV, plus XF106 / CF Euro 6 with Paccar MX-11 and MX-13. Both EAS3 (2013–2017) and EAS4 (2017 onwards) ECU variants.
See a matching delete kitIveco
Stralis, Hi-Way, Hi-Road, Hi-Street, EuroCargo, Trakker, plus Daily MY2019–2021. Irisbus coaches supported (Magelys, Crossway, Arway, Evadys, Citelis, Domino).
See a matching delete kitNorth American trucks & engines
Freightliner, Western Star, Kenworth, Peterbilt, Volvo USA and Mack USA — with full-bypass kits for Detroit Diesel and Paccar engines across EPA10, GHG14, GHG17, GHG21 and US14/17/21 standards.
Mack (Australia & USA)
Titan, Superliner, Trident with MP8 and MP10 up to 2017 (AU), plus Anthem, Pinnacle, Granite and TerraPro with MP7 and MP8 under EPA14/17/21. Full aftertreatment bypass.
See a matching delete kitDetroit Diesel
DD5, DD8, DD13, DD15 and DD16 under EPA10, GHG14, GHG17 and GHG21. Direct ACM replacement — no wire cutting, no diagnostic tool needed post-install (sootload clear excepted).
See a matching delete kitFreightliner & Western Star
Detroit Diesel engines power most of this fleet. Cascadia (IV gen), M2 106/112, Columbia, Coronado, 122SD, 114SD, EconicSD and Business Class on the Freightliner side; 4700, 4800, 4900 and 5700 on Western Star. All covered by the Detroit Diesel delete range.
See a matching delete kitPaccar (Kenworth & Peterbilt)
Kenworth T680/T880/W990 and Peterbilt 579/567/389 running PACCAR MX-11 and MX-13 GHG14 (2014–2017) or GHG17 (2017–2022). 100 % plug-and-play, no wire cutting, downstream NOx dummy plug included.
See a matching delete kitVolvo USA
VNL, VNR, VNX, VHD and VAH (2014–2025) with D11, D13, D13TC and D16 engines under US14/17/21. Direct ACM replacement.
See a matching delete kitCummins
Detroit-based EGR and AdBlue delete service for Cummins-powered trucks. Files tested in Australian conditions on triple road-train applications. Contact us for your engine family.
Ask Jack about coverageConstruction, industrial & marine engines
Off-highway plant and industrial engines where an unplanned regen or derate can stop a crew for a shift. Stage IV Final and Stage V coverage across the major European industrial engine families.
Volvo Construction Equipment
Articulated haulers (A25–A60), excavators (EC140 through EC480), wheel loaders, pipelayers and compactors with D4H through D16J engines. Tier 4, Stage IV Final and Stage V.
See a matching delete kitVolvo Penta
D5, D8, D11, D13 and D16 industrial and generator engines — TAD and TWD series. Both Tier 4 Final and Stage V AdBlue/DPF delete kits available.
See a matching delete kitMercedes-Benz Industrial
OM934, OM936, OM470, OM471 and OM473 Stage IV and Stage V engines. Covers Bell articulated haulers (B20E–B60E), JCB 457, Claas Xerion, Terex crushers, Ponsse harvesters, Dammann sprayers and other OEM applications.
See a matching delete kitScania Industrial
DC09, DC13 and DC16/DI16 industrial engines with S7/S8 ECU and EEC3 aftertreatment. Tier 4 Final and Stage V generator and industrial sets.
See a matching delete kitCummins Industrial
Industrial Cummins engines powering generators, pumps and off-highway equipment. Contact us with your engine family and ECU part number for availability.
Ask Jack about coverageBell · Terex · Ponsse · JCB · Claas
OEM machines that run Mercedes, Cummins or other mainstream industrial engines. Coverage is engine-driven — tell us the engine and we'll match the right delete kit.
Ask Jack about coverageAgricultural
Tractors, harvesters and sprayers where downtime during harvest is the most expensive hour of the year.
Case Construction
Case IH tractors and construction plant running Tier 4 and Tier 5 engines. Engine-specific delete coverage depending on the ECU variant.
Ask Jack about coverageNew Holland
FPT-powered New Holland machines — tractors and harvesters. Tier 4 Final and Stage V delete options where ACM ECUs are present.
Ask Jack about coverageClaas
Xerion tractors and harvesters running Mercedes industrial engines (OM934–OM473). Same Stage IV / Stage V ACM delete range as the Mercedes Industrial listing above.
See a matching delete kitPonsse
Forestry harvesters and forwarders running Mercedes industrial engines. Covered by the Mercedes Industrial ACM2/ACM2.1 and ACM3 delete units.
See a matching delete kitWhy operators keep coming back
Three decades in heavy diesel means Jack has seen most engines before they rolled off the production line. Every file we run through a Cummins is tested on Australian triple-road-train applications before it touches a customer truck. Every delete kit we carry has been water-tested and field-tested in AU/NZ duty cycles — not just sourced from a European catalogue page.
When you call Optima, you get Jack. Not a triage queue, not a scripted support desk. That's why the same Volvo, Scania and Mack operators send us fleet after fleet.
Common questions about brand coverage
My brand isn't listed — does that mean you can't help?
Not at all. The list shows the brands we work with regularly. Coverage is usually driven by the engine and the aftertreatment ECU, not the truck badge — so if your machine runs a Volvo, Mercedes, Scania, Cummins, Paccar or Detroit Diesel engine we can almost certainly help. Call Jack on +64 27 573 8586 or flick us an email with your engine family and ECU part number.
Do you only work on trucks, or do you do agricultural and construction too?
Both. Roughly half the work is highway trucks (Volvo, Scania, Mack, Freightliner, DAF, Mercedes) and the other half is off-highway — excavators, wheel loaders, articulated haulers, tractors, harvesters and industrial generator sets. The aftertreatment systems are essentially the same family — the housing and the duty cycle change.
Will my delete kit void the engine warranty?
If the vehicle is still under manufacturer warranty, fitting an emissions delete kit will almost always void the emissions-related portion of that warranty. We're upfront about this — if your truck is a year old, we'd recommend running the factory system until warranty expires. Most of our work is on trucks that are out of warranty and operating on a tight cost-per-kilometre number.
Can you service machines in Australia, Canada or the USA as well as New Zealand?
Yes — Optima has service agents across New Zealand, Australia, Canada and the USA. Shipping of delete units internationally is routine, and we have qualified installers in each region who can fit and commission for you.
What's the difference between a wired-in and a quick-connect delete unit?
A wired-in unit connects directly into the vehicle's wiring harness — it's permanent, cheaper, and slightly more involved to install. A quick-connect (QC) unit plugs into the existing ACM harness connector in place of the factory module — it's fully reversible, faster to install, and easier to remove if you ever sell the machine. We'll recommend the right one for your make, model and operating context.
Don't see your engine? Call Jack.
Coverage is engine-led. If we don't have the delete unit in our catalogue, we can usually source one — or tell you honestly if it's not solvable yet.