4N15 +30% Injector Nozzle Upgrade – MCR
MCR – Only the best quality 100% 🇯🇵 Japanese Made 🚚 Free Express AU Shipping 💳 Afterpay • Humm • Klarna • Zip
🔧 Serious Fueling. Serious Power. Built by MCR.
Time to wake up your Triton. These MCR Japanese-made +30% high-flow injector nozzles for the 4N15 deliver strong torque gains, faster spool, and improved top-end power — while retaining excellent drivability and clean atomisation.
Matched with correct tuning and supporting mods, these nozzles are proven in real-world Australian builds pushing harder without sacrificing reliability.
🔧 Suits
⚠️ Important Notes
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Injectors must be bench tested & shimmed after nozzle installation to ensure correct spray pattern and flow balance.
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Custom ECU tuning is required to safely utilise the increased fuel delivery.
💳 Buy Now, Pay Later
Afterpay, Humm, Klarna & Zip available.
🚚 Free Express Shipping Australia-Wide
Fast dispatch with tracking — typically ships same or next business day. If out of stock, allow ~2–3 weeks. Message us if urgently required.
Built tough. Tuned right. Proven power. Only at Common Rail Cowboys.
Frequently Asked Questions
Do I need a tune after installing these nozzles?
Yes. A custom ECU remap is strongly recommended to optimise fueling, rail pressure and timing while keeping EGTs under control.
Are these nozzles a direct fit for 4N15 injectors?
Yes. They replace the factory 4N15 nozzles, however professional installation, flow-testing and shimming is required.
What sort of gains can I expect?
With turbo, intercooler, exhaust upgrades and tuning, customers report significant torque increases and stronger top-end power. Results vary by setup and tune.
Do I need to recode the injectors?
If new calibration data is generated after testing, updated injector codes may be supplied. If injector bodies are reused, original codes are often retained — confirm with your tuner.
Will this affect warranty or road legality?
Performance modifications can affect manufacturer warranty and compliance. Always check local regulations and confirm with your tuner and insurer.
