MCR
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Ready for serious power? These MCR Japanese-spec +50% high-flow injector nozzles for the 4N15 are designed for aggressive builds chasing big torque and top-end power. With proper supporting mods and tuning, these nozzles unlock the full potential of upgraded turbo setups while maintaining excellent atomisation and reliability. Proven in high-performance Australian Triton builds.
This listing is for injector NOZZLES only — not complete injectors.
⚠️ Important: These are precision nozzles only. You reuse your existing injector bodies. Professional bench testing and shimming strongly recommended after installation.
⚠️ STROKER PUMP RECOMMENDED: +50% nozzles require significantly increased fuel delivery. Factory HP3 pump may struggle to maintain rail pressure under load. Upgraded stroker pump / upgraded pump shaft strongly recommended for reliable performance (we also have these shafts available - send us a message).
With supporting mods and proper tuning:
Professional installation essential:
*Orders placed before 2 pm AEST on business days, subject to stock availability. If out of stock, allow ~2–3 weeks. Message us if urgently required.
Q: Why do I need an upgraded stroker pump for +50% nozzles?
A: +50% nozzles require significantly more fuel volume than factory spec. The HP3 pump may struggle to maintain consistent rail pressure under load, especially at high boost. A stroker pump ensures reliable fuel delivery across the entire power band.
Q: What supporting mods are essential for +50% nozzles?
A: Minimum recommendations: upgraded turbo, large intercooler, full 3" exhaust, custom ECU tune, and ideally a stroker pump. Also recommended: boost controller, EGT monitoring, fuel pressure gauge, quality air filter.
Q: How much power can I make with +50% nozzles?
A: Power depends on your complete setup. With big turbo, stroker pump, intercooler, exhaust and quality tuning, customers have achieved very strong results. Consult your tuner for realistic targets based on your specific build.
Q: Can I run +50% nozzles on a stock turbo?
A: Sure. +50% nozzles are designed for ideally for upgraded turbo setups. Factory turbo won't support the additional fueling potential and you'll run into turbo flow limits quickly.
Q: Will +50% nozzles smoke more than +30%?
A: With proper tuning, no. Quality ECU calibration ensures clean combustion. Without proper tuning, any upgraded nozzles will smoke excessively — this is why custom tuning is mandatory.
Q: Are these suitable for daily driving?
A: With correct tuning and supporting mods, yes. Many customers daily drive +50% setups. However, these are serious performance nozzles — expect increased fuel consumption and the need for higher-quality diesel.
Q: Do I need both new nozzles AND a new pump at the same time?
A: While not absolutely mandatory, installing both together is ideal. Factory pump may work initially but will likely struggle to maintain rail pressure as boost/power increases. Budget for stroker pump upgrade to avoid running into fuel delivery limits.
Q: What's the real-world difference between +30% and +50% nozzles?
A: +30% suits moderate builds with stock or mildly upgraded turbos. +50% is for serious builds with big turbos, stroker pumps, and aggressive tuning. If you're not planning major supporting mods, +30% is the better choice.
MCR Japanese-made +50% nozzles. Stroker pump recommended. Professional installation recommended. Custom ECU tune mandatory. Free express shipping AU.
Disclaimer: Common Rail Cowboys is not affiliated with Mitsubishi Motors or MCR. Performance modifications can affect manufacturer warranty and compliance. Professional installation and ECU tuning required.
