Chasing extra grunt from the Isuzu 4JJ3? Stock figures in Australia are around 140 kW and 450 Nm, which is sturdy enough, but a quality ECU remap (with DPF/EGR intact) typically adds about +15–25 kW and +40–70 Nm on standard hardware.
A better intercooler and a tidy DPF‑back exhaust help with consistency under heat and towing, but don’t expect miracle peaks without pushing reliability.
Keep torque sensible (around the 500–520 Nm zone) to keep the Aisin auto and driveline sweet, and monitor EGTs like a hawk.
Big no‑no: deleting DPF/EGR—illegal in Australia, unroadworthy, insurance‑voiding, and wallet‑immolating if EPA gets involved.
Any tune can affect warranty, so use a reputable tuner, get before/after dyno sheets, and ask for a towing‑friendly, heat‑managed calibration.
Do it right and you’ll feel the shove without turning your ute into a hand grenade with a speedo.
Check back soon, or revise your filters.
Listing your ad only takes a few minutes, and most categories are free.
Post an adA weekly hand-picked round-up of the best bargains, free stuff, and trending listings. No spam, unsubscribe anytime.
Know someone looking to buy or sell something? Send them to Tradingpost, Australia's original marketplace.
Know the warning signs of a dodgy deal before you buy or sell online.
Read the guideRead guide