• FLEX PRO R31-R V2 Turbo
  • FLEX PRO R31-R V2 Turbo manifold flange
  • FLEX PRO R31-R V2 Turbo Rear Housing
  • FLEX PRO R31-R V2 Turbo
  • FLEX PRO R31-R V2 Turbo
  • FLEX PRO R31-R V2 Turbo
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Flex

Flex Pro R31-R V2 Turbo - Mini F55

Flex Pro R31-R V2 Turbo - Mini F55

$1,999.00 AUD
$1,999.00 AUD
Sale Sold out
Tax included in Australia, Shipping calculated at checkout.

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 as the Mini F55. This 44 mm gated turbo gives rapid low–mid spool, sharp response, and the iconic F55 whistle/StustustU—ideal for daily, touring, and performance builds.

📦 What's Included:

  • FLEX PRO R31-R V2 Turbo (44 mm gated – Mini F55)
  • Install Kit – Gaskets
  • Oil Feed Line & Oil Return Fittings
  • Liqui Moly turbo pre-lube

Everything you need for an easy, complete installation.

⚙️ Turbo Specs:

  • Compressor Wheel: 44.5 mm, 6-blade
  • Turbine Wheel: 46 mm, 12-blade
  • Flange: RHF4 (4JJ1 style)
  • Boost Rating: Up to 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. 44 mm dump pipe required; EGR delete required.*

💪 Why Choose Mini F55?

  • Iconic StuStuStu Sound – Mini F55 whistle and spool
  • Fast Spooling Gated Turbo – near-instant boost response
  • Built for Reliable Power – 35 PSI rating
  • Street & Touring Friendly – balanced sound/power
  • Easy Install – drop-in style for most 4JJ1 setups

💵 Buy Now, Pay Later

Flexible payment with Afterpay, Humm, Klarna, and Zip.

🚚 Free Express Shipping Australia-Wide

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

Frequently Asked Questions

Is this a direct bolt-on for all 4JJ1 models?
Fitment targets common 4JJ1 applications but minor manifold work (trim or drill/tap), a 44 mm dump pipe, and EGR delete are typically required.
Do I need a tune after installing the Mini F55?
Yes — an ECU remap is recommended to calibrate boost, rail pressure, and fueling for best response and safe EGTs.
What boost should I run?
The turbo is rated up to ~35 PSI. Your tuner will set targets suited to your injectors, intercooler, and intended use.
Will it pass a roadworthy with EGR deleted?
EGR removal may not be road-legal in your region. Intended for off-road/competition use where permitted — check local regulations.
What else should I upgrade?
A quality intercooler, 3″ exhaust, and good boost/EGT monitoring are recommended. Ensure oil feed/return are clean and prime the turbo with fresh oil at install.
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