• HPD Special Parts HPD 4JJ1 Boost Gauge Adapter for diesel engines, showing the metal fitting and connector for installation.
  • HPD Special Parts 4JJ1 Boost Gauge Adapter showing metal fitting and connector for vehicle boost gauge installation.
  • HPD 4JJ1 Boost Gauge Adapter for automotive boost gauge installation, made by HPD Special Parts.
  • HPD 4JJ1 Boost Gauge Adapter from HPD Special Parts, designed for connecting boost gauges to vehicle engines.
  • HPD 4JJ1 Boost Gauge Adapter by HPD Special Parts, shown in a close-up image, designed for installing boost gauges in vehicles.
  • HPD 4JJ1 Boost Gauge Adapter for automotive boost gauge installation, compatible with HPD Special Parts products.
  • HPD Special Parts HPD 4JJ1 Boost Gauge Adapter for connecting boost gauges in vehicles, shown in a close-up image.
  • HPD 4JJ1 Boost Gauge Adapter for diesel engines, shown in a close-up image with metal fittings and connectors.
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HPD Special Parts

HPD 4JJ1 Boost Gauge Adapter

HPD 4JJ1 Boost Gauge Adapter

(12)

$82.79 AUD
$82.79 AUD
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HPD 4JJ1 Boost Gauge Adapter

Billet Aluminium | Direct Fit | 4JJ1 Engines

HPD Special Parts 490+ Sold ✅ Multiple Colours DIY Friendly 💳 Afterpay • Humm • Klarna • Zip 🚚 Free Express Shipping AU

Monitor your boost the right way with the HPD Boost Gauge Adapter – precision-made for Isuzu 4JJ1 engines by HPD Special Parts Thailand. With over 490 units sold to D-MAX, MU-X and Colorado owners across Australia, this is the proven solution for clean boost gauge installation. Forget drilling, welding, or dodgy T-piece installs. This billet adapter gives you a clean, factory-style solution to run your boost gauge, whether you're tracking stock boost or tuning for serious power.

💪 Key Features
  • Billet anodised aluminium – available in multiple HPD colours
  • Leak-free install – includes stainless bolts & new O-ring
  • Direct fit design – no cutting or mods required
🚙 Vehicle Compatibility
  • Holden Rodeo RA7 – 4JJ1
  • Holden Colorado RC – 4JJ1
  • Isuzu D-MAX – 2006–2016 - 4JJ1 - (Pre-DPF)
  • Isuzu MU-X – 2012–2016 - 4JJ1 - (Pre-DPF)
🛠 Install Notes

Direct bolt-in upgrade – no tuning or extra parts needed. Ideal for anyone fitting a boost gauge and wanting it done properly the first time.

🚚 Shipping & Payment
  • 📦 Same Day Dispatch* — order before cut-off for same business day shipping
  • 🚚 Free Express Shipping Australia-Wide — full tracking included
  • 💳 Buy Now, Pay Later: Afterpay, Humm, Klarna & Zip
  • 🇦🇺 All major credit cards accepted

*Orders placed before 2 pm AEST on business days, subject to stock availability.

📝 Availability

Some colour options may sell out quickly. If unavailable, we'll contact you with alternatives or order it in specially for you 🤙

HPD Special Parts • Billet Aluminium • Direct Fit 4JJ1

Precision-made boost gauge adapter. Multiple colours available. DIY friendly. Free express shipping AU.

Disclaimer: Common Rail Cowboys is not affiliated with HPD Special Parts Thailand, Isuzu Motors or General Motors. DIY installation at your own risk.

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