🔩 4JJ1 Stroker Shaft – 1.3mm by Fuse Tech

Upgrade your HP3 pump for serious power, faster fuel delivery, and stronger rail pressure response.

The 4JJ1 1.3mm Stroker Shaft by Fuse Tech is built for diesel performance enthusiasts chasing reliable gains in horsepower and torque from their Isuzu 4JJ1 fuel system. CNC-machined to precision standards and pressure-tested, this is the proven upgrade for extracting maximum output from your Denso HP3 pump.

✅ Key Features:

• 🧰 Precision Machined: 1.3mm stroker profile increases pump stroke & fuel volume
• ⚙️ Enhanced Fuel Delivery: Supports 400+ RWHP builds with the right injectors & tune
• 🔧 Drop-In Fit: Suits Denso HP3 pumps with minimal modification
• 🛡️ Durability: Premium high-strength materials built to handle sustained rail pressure
• 💸 Performance Value: Big power gains without the cost of a full stroker pump

📦 Suits:

• Holden Colorado RC & RG – 4JJ1
• Isuzu D-MAX – 4JJ1 (non-DPF & early DPF models)
• Isuzu MU-X – 4JJ1 (up to 2016)
• Any vehicle running a Denso HP3 pump on the 4JJ1 platform

💡 Notes:

• 🚨 Professional installation recommended
• 📦 Installation instructions not included
• 📲 Message us to confirm stock availability if urgent

Why Buy from Common Rail Cowboys?

• 🔩 Trusted Diesel Performance Experts
• 🚚 Free Express Shipping Australia Wide
• 💳 Afterpay, Humm, Klarna & Zip Available – Get It Now, Pay Later

Ready to push your 4JJ1 further? Upgrade your HP3 pump today with the Fuse Tech 1.3mm Stroker Shaft — unleash the power your build deserves. 👊

❓ FAQs