HPD Special Parts
HPD 4JJ1 Boost Gauge Adapter
HPD 4JJ1 Boost Gauge Adapter
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HPD 4JJ1 Boost Gauge Adapter
Billet Aluminium | Direct Fit | 4JJ1 Engines
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.
