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 | ✅ Complete Install Kit | ✅ Free Express Shipping Australia-Wide

Take your 4JJ1 build to the next level with the FLEX PRO R31-R V2 Turbo Kit – known by diesel enthusiasts as the Mini F55. This 44mm wastegated turbo delivers fast low-mid RPM spool, crisp throttle response, and that iconic high-pitched whistle, all while staying rock-solid under pressure. Perfect for touring, daily driving, and performance builds chasing serious output and style.

📦 What’s Included

• 1 x FLEX PRO R31-R V2 Turbo (44mm gated – Mini F55)

• 1 x FLEX Install Kit – Gaskets & Dump Pipe Flange

• 1 x FLEX Oil Feed Line & Oil Return Fittings

• 1 x Liquid Moly Pre-lube 

Everything you need for a smooth and complete install.

⚙️ Turbo Specs

• Compressor Wheel: 44.5mm – 6-blade

• Turbine Wheel: 46mm – 12-blade

• Flange: RHF4 (standard 4JJ1 style)

• Boost Rating: 35 PSI

• Wastegate Actuator: Fully assembled & pre-set

• Turbo Sound: F55-style whistle and StuStuStu – clean, sharp, and loud

🔧 Compatible Vehicles (4JJ1 Engines)

• Rodeo RA7 – 2007–2008

• Holden Colorado RC – 2008–2011*

• Holden Colorado RG – 2012–2017*

• Isuzu D-MAX – 2008–2016*

• Isuzu MU-X – 2012–2016*

If fitting to a factory 4JJ1 VGT manifold, you may need to trim one side of the flange, drill/tap the stock manifold. 44mm Dump pipe required

💪 Why Go Mini F55?

• That F55-StuStuStu – The sound everyone’s chasing!
  
  

• Quick-Spooling, Gated Turbo – Near Instant boost response!

• Built for Power – Reliable up to 35 PSI with supporting mods

• Perfect for Street & Touring Builds – Balanced power and sound

• Straightforward Install – Drop-in fit for most 4JJ1 setups

💵 Buy Now, Pay Later

We offer flexible payment options through:
Afterpay, Humm, Klarna, and Zip – so you can boost now, pay later.

🚚 Free Express Shipping Australia-Wide

Fast dispatch with tracking – typically ships same or next business day