FLEX PRO R31-R V2 Turbo Kit – Mini F55 for 4JJ1 Diesel

Signature F55 Sound | Fast Spool | Built for Power

✅ 30–35 PSI Boost | ✅ Aggressive StuStuStu Sound | ✅ Complete Kit | ✅ Free Express Shipping

Elevate your 4JJ1 diesel build with the FLEX PRO R31-R V2 Turbo Kit, known among enthusiasts as the Mini F55. This 44mm gated turbo provides rapid low-to-mid RPM spool, sharp throttle response, and the iconic F55 whistle and StuStuStu sound—perfect for daily driving, touring, and performance builds.

📦 What's Included:

• FLEX PRO R31-R V2 Turbo (44mm gated – Mini F55)
• Install Kit – Gaskets & Dump Pipe Flange
• Oil Feed Line & Oil Return Fittings
• Liquid Moly Pre-lube

Everything you need for an easy, complete installation.

⚙️ Turbo Specs:

• Compressor Wheel: 44.5mm, 6-blade
• Turbine Wheel: 46mm, 12-blade
• Flange: RHF4 (4JJ1 style)
• Boost Rating: 35 PSI
• Wastegate Actuator: Fully assembled & pre-set
• Sound: F55-style whistle & StuStuStu

🔧 Compatible Vehicles:

• Rodeo RA7 (2007–2008)
• Holden Colorado RC (2008–2011*)
• Holden Colorado RG (2012–2017*)
• Isuzu D-MAX (2008–2016*)
• Isuzu MU-X (2012–2016*)

*Factory manifold may need trimming or drilling/tapping. 44mm dump pipe required.

💪 Why Choose Mini F55?

• Iconic StuStuStu Sound – Legendary F55 whistle and spool sound
• Fast Spooling Gated Turbo – Instant boost response
• Built for Reliable Power – 35 PSI rating ideal for performance upgrades
• Perfect Street & Touring Setup – Excellent balance of sound and power
• Easy Installation – Drop-in replacement for most 4JJ1 setups

💵 Buy Now, Pay Later

Flexible payment available through Afterpay, Humm, Klarna, and Zip.

🚚 Free Express Shipping Australia-Wide

Fast dispatch with tracking—typically ships same or next business day.