• HPD Crank Case Breather - 4JJ1 - 4JJ3 - Top Exit - Common Rail Cowboys
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HPD Special Parts

HPD Crank Case Breather - 4JJ1 - 4JJ3 - Top Exit

HPD Crank Case Breather - 4JJ1 - 4JJ3 - Top Exit

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$96.50 AUD
$96.50 AUD
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HPD Top Exit Crankcase Breather

4JJ1 / 4JJ3

 

✅ Top Exit Design | ✅ CNC Alloy | ✅ Free Express Shipping Australia-Wide

🧰 CNC Alloy 🚚 Express Shipping 💳 Afterpay • Humm • Klarna • Zip
🧩 Product Overview

The HPD Top Exit Crankcase Breather is designed for clean, upward hose routing on 4JJ1 and 4JJ3 engines. Perfect for tight bays, custom catch can setups, or HPD alloy rocker covers.

👉 Need the matching -10AN adapter? Click here.

🔧 Vehicle Compatibility
  • Holden Rodeo RA7 – 2007–2008
  • Holden Colorado RC – 2008–2012
  • Isuzu D-MAX (4JJ1) – 2008–2019
  • Isuzu D-MAX (4JJ3) – 2020–on*
  • Isuzu MU-X (4JJ1) – 2013–2019
  • Isuzu MU-X (4JJ3) – 2020–on*
  • Mazda BT-50 (4JJ3-TCX) – 2020–on*

* Requires 4 × 8G / 4.2 × 16 mm stainless screws (not included).

📦 Key Features
  • Top-exit outlet — ideal for upward or compact catch can routing
  • CNC-machined alloy with high-quality finish
  • Perfect for -10AN catch can plumbing (adapter sold separately)
  • Compatible with OEM & HPD alloy rocker covers
  • Not compatible with factory top-mount intercoolers
🛠️ 4JJ3 owners: screws required for mounting (not included).
🛠️ Install Overview
  • Remove factory breather
  • Clean mounting surface
  • Install HPD breather using correct screws
  • Route to catch can or vent system
🧰 Tools & Hardware
  • Phillips or hex driver
  • 4 × 8G (4.2 × 16 mm) stainless screws (4JJ3)
  • Thread locker
  • -10AN adapter & hose (optional)
🚚 Shipping & 💳 Payments
  • Free Express Shipping Australia-Wide
  • Afterpay, Humm, Klarna & Zip available
📦 Dispatch & Tracking
  • Same-day or next-day dispatch
  • Express, trackable delivery
🌏 International Orders
Message us for an international shipping quote.
⚠️ Stock & Availability

Usually in stock. Some batches may have 1–3 week delays. Message us first if urgent.

❓ FAQs
Will this fit both 4JJ1 and 4JJ3?
Yes. Works for both. 4JJ3 requires suitable stainless screws.
Is it compatible with the factory top-mount intercooler?
No — the top-exit design interferes with top-mount intercoolers.
Can I run this with a catch can?
Yes — pair it with the -10AN push-in adapter for proper sealed plumbing.
Is hardware included?
No. Screws required for 4JJ3 installs are not included.

👉 Clean, compact, catch-can-ready breather routing — upgrade your 4JJ with HPD’s top-exit breather today.

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