• HP5 Stroker Shaft - 1GD/4JJ3 - 18mm - Fusetech
  • HP5 Stroker Shaft - 1GD/4JJ3 - 18mm - Fusetech
  • HP5 Stroker Shaft - 1GD/4JJ3 - 18mm - Fusetech
  • HP5 Stroker Shaft - 1GD/4JJ3 - 18mm - Fusetech
  • HP5 Stroker Shaft - 1GD/4JJ3 - 18mm - Fusetech
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FuseTech

HP5 Stroker Shaft - 1GD/4JJ3 Stroker Shaft - 18mm - Fusetech

HP5 Stroker Shaft - 1GD/4JJ3 Stroker Shaft - 18mm - Fusetech

$1,035.00 NZD
$1,035.00 NZD
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HP5 Stroker Shaft - 1GD/4JJ3 Stroker Shaft - 18mm - Fusetech

 

✅ 50% Stroke Increase | ✅ Built for High RPM Delivery | ✅ Made in Thailand 🇹🇭

Unleash the full fuel delivery potential of your HP5 pump with the Fusetech 18mm Stroker Shaft – designed specifically for 1GD-FTV and 4JJ3 engines. This precision-machined upgrade increases stroke from the factory ~12 mm to a massive 18 mm — a +50% lift gain that helps deliver higher rail pressure and better fuel volume at every RPM.

🔥 Why Upgrade to an 18mm HP5 Stroker Shaft?
  • +50% Stroke Increase: Stock stroke is ~12 mm – this shaft delivers 18 mm for serious fueling gains.
  • High-RPM Ready: Supports aggressive tuning and larger injectors with reduced pressure drop-off.
  • Precision Machined: Built for long-term reliability under extreme loads.
  • Made in Thailand: Engineered and manufactured to exacting Fusetech standards.
✅ Suits the Following Models
  • 1GD-FTV: Toyota Hilux, Prado & Fortuner (pre I-ART system)
  • 4JJ3: Isuzu D-MAX, MU-X & Mazda BT-50 (2020+)
🔧 Technical & Installation Notes
  • Professional pump disassembly/reassembly strongly recommended.
  • Custom ECU calibration required to take advantage of increased delivery.
  • Verify overall fuel system health (rail sensor, relief/blank, injectors, lines) before tuning.
  • For off-road/competition applications where permitted.
📦 What’s Included
  • Fusetech 18 mm HP5 Stroker Shaft
  • Packaging/protective sleeve (installation hardware handled by pump builder)
💳 Payment & 🚚 Shipping
  • Flexible payments: Afterpay, Humm, Klarna, Zip
  • Free Express Shipping Australia-Wide – typically ships same or next business day*

*If not in stock, dispatch may take 2–3 weeks. Message us if you need it urgently.

Chasing more rail pressure, cleaner combustion, and peak diesel output?
Upgrade your HP5 with the Fusetech 18 mm stroker shaft and feed your build properly.

Frequently Asked Questions

Will this fit I-ART versions of 1GD?
No — this shaft suits pre I-ART 1GD-FTV only. If unsure, send us your VIN and we’ll confirm.
Do I need tuning after installation?
Yes — a custom ECU calibration is required to command the additional delivery safely and avoid rail pressure faults.
What rail pressure gains should I expect?
The 18 mm stroke provides substantially more pump displacement. Actual rail pressure gains depend on injector condition, relief strategy (or rail blank), and tuner settings.
Can I install this at home?
We strongly recommend a professional pump builder. The HP5 requires precise assembly, clearances and cleanliness to avoid premature failure.
Is it road legal?
Fuel system modifications may affect compliance. This product is intended for off-road/competition use where permitted. Check local regulations.
Fusetech 18mm HP5 Stroker Shaft – 1GD / 4JJ3 Fusetech https://schema.org/VehiclePart 18 mm stroker shaft for HP5 pumps on 1GD-FTV (pre I-ART) and 4JJ3 applications. +50% stroke vs ~12 mm stock for higher pump displacement and improved rail pressure with tuning. Toyota 1GD-FTV (pre I-ART) / Isuzu 4JJ3 HP5 pump applications Common Rail Cowboys
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