• Flex Monoblock DMAX / MUX intercooler for 2012-2019 vehicles, showing a sleek metal intercooler core with mounting brackets.
1 1

Flex

FLEX Monoblock DMAX / MUX Intercooler - (2012-2019)

FLEX Monoblock DMAX / MUX Intercooler - (2012-2019)

$1,842.00 NZD
$1,842.00 NZD
Sale Sold out

Taxes excluded. Shipping calculated at checkout.

Ships Same or Next Business Day
Secure Checkout
VISA Pay Pay

FLEX Intercooler – Isuzu D-MAX / MU-X (2012–2020)

✅ Drop-in Replacement | ✅ Monoblock Core | ✅ Supports F44 & F55 Turbos | ✅ Free Express Shipping AU-Wide

Built for Cool, Consistent Power

The FLEX Monoblock Intercooler for Isuzu D-MAX / MU-X (2012–2020) is a bolt-in, high-performance upgrade that replaces the restrictive factory unit. Designed to keep charge-air temps low on tuned 4JJ1 setups, it delivers stronger, more repeatable power on road, tow, or track—without cutting or welding.

🔧 Key Benefits
  • Massive surface area vs. factory for superior heat rejection (approx. 605 × 255 × 65 mm core)
  • Monoblock construction for durability and efficient airflow
  • Supports high-boost builds – tested to 100 psi
  • Perfect match for F44 & F55 turbos and other aftermarket setups
  • No fabrication required – mounts to the factory location
  • Factory pipe compatibility – suits 2.5" inlet & outlet
📐 Specifications
Vehicle Platform Isuzu D-MAX / MU-X (Gen 2) 2012–2020
Engine 4JJ1
Core Size (approx.) 605 × 255 × 65 mm
Boost Capability Up to 100 psi
Inlet / Outlet 2.5" (factory pipes)
Install Direct bolt-in—no cutting, drilling or welding
🚙 Compatible Vehicles
  • Isuzu D-MAX 2012–2020 (4JJ1)
  • Isuzu MU-X 2013–2020 (4JJ1)
📦 What’s Included
  • FLEX Monoblock Intercooler Assembly
  • Uses factory mounting hardware (direct fit)
📝 Notes

Designed to work with the OEM 2.5" intercooler piping. If you’re running custom piping, confirm coupler sizing before install. Performance gains depend on tune, turbo, ambient temps, and load.

🤠 Why Buy from Common Rail Cowboys
  • Free Express Shipping Australia-Wide
  • Afterpay / Humm / Klarna / Zip available at checkout
  • QLD-based diesel specialists—real support for real builds

Frequently Asked Questions

Will this work with my F44 or F55 turbo?
Yes—this intercooler is designed to support popular D-MAX/MU-X upgrade paths including Low Mount F44 and F55 turbos, keeping IATs in check under sustained load.
Do I need to modify anything?
No. It fits the factory location and interfaces with the OEM 2.5" intercooler pipes. Always test-fit and re-torque clamps after a heat cycle.
How much power will I gain?
Intercoolers don’t add power by themselves—they enable your tune and turbo to hold power longer by controlling intake temps. Expect improved consistency when towing or in hot conditions.

Availability: Generally in stock; if sold out, allow ~1–3 weeks for dispatch. For urgent timelines, message us before ordering.

Ready to keep EGTs down and power up?
Add the FLEX Intercooler to cart now—Free Express Shipping included.

View full details