Flex
Flex Pro R31-R V2 Turbo - Mini F55
Flex Pro R31-R V2 Turbo - Mini F55
Regular price
$2,435.00 NZD
Regular price
Sale price
$2,435.00 NZD
Taxes included.
Shipping calculated at checkout.
Quantity
Couldn't load pickup availability
FLEX PRO R31-R V2 Turbo Kit – Mini F55
Signature F55 Sound | Fast Spool | Built for Power
✅ 30–35 PSI Boost | ✅ Aggressive StuStuStu Sound | ✅ Complete Kit | ✅ Free Express Shipping
Take your 4JJ1 build to the next level with the FLEX PRO R31-R V2 Turbo Kit, also known as the Mini F55. This 44 mm gated turbo delivers rapid low–mid spool, sharp throttle response and the iconic F55 whistle / StuStuStu chatter — making it a perfect upgrade for daily driving, touring and performance applications.
📦 What’s Included
- FLEX PRO R31-R V2 Turbo (44 mm gated – Mini F55)
- Install gaskets
- Oil feed line & oil return fittings
- Liqui Moly turbo pre-lube
Complete kit with essentials for a clean 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: pre-set, ready to run
- Sound: F55-style whistle + StuStuStu
🚙 Compatible Vehicles
- Holden Rodeo RA7 (2007–2008*)
- Holden Colorado RC (2008–2011*)
- Holden Colorado RG (2012–2017*)
- Isuzu D-MAX (2008–2016*)
- Isuzu MU-X (2012–2016*)
*Some installs may require trimming/drilling the manifold, a 44 mm dump pipe, and EGR delete.
💪 Why Choose Mini F55?
- ✅ Iconic StuStuStu Sound – unmistakable turbo whistle & chatter
- ✅ Fast-spooling gated turbo – excellent low–mid response
- ✅ 35 PSI boost ready – performance headroom
- ✅ Street & touring friendly – balance of sound and drivability
- ✅ Easy install – drop-in style for most 4JJ1 setups
💳 Payment & 🚚 Shipping
- Buy Now, Pay Later: Afterpay, Humm, Klarna, Zip
- Free Express Shipping Australia-Wide – fast, trackable dispatch (usually same or next business day)
Frequently Asked Questions
Is this a direct bolt-on for all 4JJ1 models?
Fitment suits common 4JJ1 applications but usually requires minor manifold work (trim/drill/tap), a 44 mm dump pipe and EGR delete.
Do I need a tune after installing the Mini F55?
Yes — an ECU remap is recommended to set safe boost, rail pressure and fueling for best results.
What boost should I run?
The turbo is capable of up to 35 PSI. Your tuner will set safe targets based on injectors, intercooler and usage.
Will it pass a roadworthy with EGR deleted?
No — EGR removal may not be legal in your region. This kit is sold for off-road/competition use only where permitted.
What else should I upgrade?
We recommend a quality intercooler, 3″ exhaust, accurate boost/EGT monitoring, and ensuring oil feed/return are clean. Always prime the turbo with oil before first start.
