• Isuzu 4JJ3 +30 Injectors DMAX, MUX and BT50 2020 - On - Common Rail Cowboys
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Denso

Isuzu 4JJ3 +30 Injectors DMAX, MUX and BT50 2020 - On

Isuzu 4JJ3 +30 Injectors DMAX, MUX and BT50 2020 - On

$4,377.50 AUD
$4,377.50 AUD
Sale Sold out

Taxes included. Shipping calculated at checkout.

Built to order

4JJ3 +30 Injectors – Isuzu D-MAX / MU-X & Mazda BT-50 (2020+)

✅ Genuine Denso | ✅ Built for Boosted Builds | ✅ Free Express Shipping

Unleash your 4JJ3’s potential with a set of brand-new Modified Genuine Denso injectors fitted with +30% high-flow nozzles. No exchange cores — just Japanese quality and calibrated, consistent delivery for tuned diesels.

Perfect match for popular turbo upgrades:

🧾 Part Numbers
  • Denso: 295700-1060
  • Isuzu / GM: 8-98399618-0

Compensation Code: begins with A9 (stamped on each injector). Check before ordering.

🔧 Fitment & Requirements
  • Vehicles: Isuzu D-MAX 4JJ3 (2020+), Isuzu MU-X 4JJ3 (2020+), Mazda BT-50 4JJ3-TCX (2020+)
  • Tuning: Professional ECU remap required to calibrate fuel, EGTs and rail pressure.
  • Supporting Mods: Intercooler/intake/exhaust and an upgraded turbo recommended for target gains.
  • Compliance: Ensure any emissions changes comply with local laws (on-road tampering may be illegal).
⚠️ Injector Disclaimer

Modified & Oversized Injectors
Where a modified or “+size” injector is advertised or sold as a Genuine injector (of any brand, including but not limited to Denso), it is expressly understood that the term Genuine refers only to the injector body, not the nozzle.

The original nozzle has been replaced or modified to achieve the increased flow rate, meaning it is no longer the original OEM component. The modification process, performance outcome, and characteristics may vary between manufacturers or suppliers.

Buyers should be aware that while the injector body remains genuine OEM, the nozzle and overall flow characteristics differ from original factory specifications.

💳 Payment & 🚚 Shipping
  • Afterpay, Humm, Klarna & Zip available at checkout
  • Free Express Shipping Australia-Wide — fast, trackable dispatch (usually same or next business day)

Frequently Asked Questions

Will these +30 injectors work on a stock turbo?
Yes, but a tune is still required. You’ll see the biggest benefits with an upgraded turbo and cooling package.
Do I need to code the injectors to the ECU?
Yes. Enter each injector’s A9 compensation code during installation. Your tuner or workshop will handle this along with the remap.
Are these brand new Denso units?
Yes — new Genuine Denso injectors modified with Japanese +30% nozzles. No exchange or recon cores.
What else should I upgrade?
At minimum: quality intercooler, free-flowing exhaust, clean intake/airbox, and a professional tune. High-power builds may require an HP5 stroker shaft and larger turbo.
What’s the typical lead time?
Usually in stock for 1–4 business-day dispatch. If temporarily out of stock, allow ~1–3 weeks — we’ll confirm ETA.

Common Rail Cowboys is not affiliated with Isuzu Motors or Denso. Fitment and compliance are the buyer’s responsibility.

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