• 4JJ3 Bolt-On Intercooler Upgrade 2020+ Dmax/BT50 - FLEX - Common Rail Cowboys
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Flex

4JJ3 Bolt-On Intercooler Upgrade 2020+ Dmax/BT50 - FLEX

4JJ3 Bolt-On Intercooler Upgrade 2020+ Dmax/BT50 - FLEX

$1,349.00 AUD
$1,349.00 AUD
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4JJ3 Bolt-On Intercooler Upgrade 2020+ DMAX/BT-50 – FLEX

 

FLEX Monoblock Bolt-On Performance Intercooler

 

Step up your cooling game with this heavy-duty FLEX Monoblock Intercooler – the perfect bolt-on upgrade for tuned or heavy-use DMAX, MU-X, and BT-50 builds.

🔧 Key Features
  • ✅ Direct bolt-on fitment – no fabrication required
  • ✅ One-piece monoblock casting – stronger and leak-free
  • ✅ Handles up to 80 PSI of boost – built for serious business
  • ✅ Improves charge cooling – lowers intake temps and reduces heat soak
📐 Specifications
  • Brand: FLEX
  • Core size: 620 × 252 × 63.5 mm
  • Suits: 2020+ Isuzu D-MAX, MU-X & Mazda BT-50 (pre-facelift)
💡 Why Upgrade?

Whether you’re towing, touring, or chasing power gains, this intercooler delivers the airflow and durability modern turbo diesels need.

🚚 Shipping & Payment
  • 🚚 Free Express Shipping Australia-Wide
  • 💸 Buy Now, Pay Later with Afterpay, Zip & More

Note: Please allow 2–3 weeks for delivery if out of stock – message us if you need this urgently.

Frequently Asked Questions

Is this a true bolt-on intercooler?
Yes — designed to replace the factory cooler on 2020+ D-MAX/MU-X and BT-50 (pre-facelift) with no cutting or welding when used with OEM mounting and hose locations.
Do I need a tune after installing?
No tune is strictly required. A tune can extract more benefit by optimising boost, fueling and timing to take advantage of the lower IATs.
What boost pressure can it handle?
The FLEX monoblock core is rated up to 80 PSI. Actual safe boost depends on your turbo, clamps/couplers, and overall setup quality.
Will it work with my existing piping?
Yes — it’s built around OEM routing. Aftermarket piping kits that relocate outlets may require minor adjustments.
Which models/years does it fit?
2020+ Isuzu D-MAX, MU-X and Mazda BT-50 (pre-facelift). For facelift vehicles, confirm cooler mounting and outlet positions or message us with your VIN.
What’s the typical lead time?
In-stock items ship same/next business day. If out of stock, expect ~2–3 weeks from Thailand stock. Contact us if you’re on a deadline.

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