• HPD Crankcase Breather - 4JJ1 - 4JJ3 - Side Exit - Common Rail Cowboys
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HPD Special Parts

HPD Crankcase Breather - 4JJ1 - 4JJ3 - Side Exit

HPD Crankcase Breather - 4JJ1 - 4JJ3 - Side Exit

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$120.00 NZD
$120.00 NZD
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HPD Side Exit Crankcase Breather –

4JJ1 / 4JJ3

 

✅ Side Exit Design | ✅ Bolt-On Fitment | ✅ Free Express Shipping Australia-Wide

 

Upgrade your 4JJ breather system with the HPD Side Exit Crankcase Breather – designed specifically for 4JJ1 and 4JJ3 engines. Perfect for custom catch can setups or high-performance builds requiring a clean breather exit point.

Need the matching push-in -10AN adapter? Grab it here.

🔧 Suits the Following Vehicles
  • Holden Rodeo RA7 – 2007–2008
  • Holden Colorado RC – 2008–2012
  • Isuzu D-MAX 4JJ1 – 2008–2020
  • Isuzu D-MAX 4JJ3 – 2020 onwards*
  • Isuzu MU-X 4JJ1 – 2013–2020
  • Isuzu MU-X 4JJ3 – 2020 onwards*
  • Mazda BT-50 4JJ3-TCX – 2020 onwards*

* Requires 4 × 8G (4.2 × 30 mm) pan-head self-tapping stainless screws (max head Ø 8.5 mm).

❌ Not compatible with 4JJ1-TC models running the factory top-mount intercooler.
📦 What You Need to Know
  • Made by HPD Special Parts – Thai import
  • Side exit design for cleaner routing and catch can setups
  • For 4JJ3 models, suitable mounting screws are required (not included)
🧩 Fitment Notes
  • Direct bolt-on to 4JJ1/4JJ3 rocker cover breather location.
  • Verify clearance with aftermarket intercooler piping.
  • Use medium-strength thread locker on self-tappers.
🛠️ Install Overview
  1. Remove factory breather outlet and clean sealing area.
  2. Position the HPD side-exit breather and mark holes (if required).
  3. Fasten using the recommended hardware; do not overtighten.
  4. Route hose to catch can or safe vent point; secure with clamps.
🧰 Tools & Hardware
  • Phillips or hex driver (per screw type)
  • 4 × 8G (4.2 × 30 mm) stainless pan-head screws for 4JJ3
  • Thread locker (medium)
💳 Flexible Payment Options

Afterpay, Humm, Klarna, and Zip available at checkout.

🚚 Free Express Shipping Australia-Wide

Typically ships same or next business day – unless out of stock.

📦 Dispatch & Tracking
  • Express postage AU-wide with tracking.
  • Signature on delivery available on request.
🌏 International

Need international shipping? Message us for a quote before ordering.

⚠️ Stock Notice

These are usually in stock. Occasionally, a 1–3 week wait may apply depending on demand. Need it urgently? Shoot us a message through the store chat before ordering!

❓ FAQs

Will this fit 4JJ1 and 4JJ3 without modifications?

Yes. It’s a bolt-on solution for 4JJ1 and 4JJ3 rocker cover breather locations. For 4JJ3, suitable mounting screws are required (not included).

Is it compatible with factory top-mount intercoolers?

No. Not compatible with 4JJ1-TC models running the factory top-mount intercooler due to clearance.

Do I need an additional adapter?

If you want to plumb to a catch can using -10AN hose, use the matching push-in -10AN adapter (sold separately).

How fast do you ship?

Orders typically ship the same or next business day via express post within Australia, subject to stock availability.

HPD Side Exit Crankcase Breather – 4JJ1 / 4JJ3 HPD Special Parts https://schema.org/VehiclePart Side exit crankcase breather by HPD Special Parts for Isuzu 4JJ1 and 4JJ3 engines. Bolt-on fitment; ideal for clean catch can routing. Aluminium DesignSide exit breather Compatibility4JJ1 / 4JJ3 engines Isuzu D-MAX 4JJ1 (2008–2020) Isuzu D-MAX 4JJ3 (2020–on) Isuzu MU-X 4JJ1 (2013–2020) Isuzu MU-X 4JJ3 (2020–on) Mazda BT-50 4JJ3-TCX (2020–on)

 

 

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