HPD Special Parts Thai Import aluminum rocker cover for Euro 4 4JJ1 & 4JJ3 engines. Painted finish for a tough OEM+ look. These covers are very limited stock – levels are live and current.

Transform your engine bay with a stylish Thai-designed rocker cover, perfect for spicing up your build and complementing other HPD hardware.

Suits rocker covers with 4 bolts across the front side:

• Isuzu D-MAX / MU-X Euro 4 (4JJ1)
  
  
• Isuzu D-MAX / MU-X 4JJ3
  
  
• Mazda BT-50 (4JJ3)

• ✅ Aluminum construction – lightweight & durable
• ✅ Painted finish – OEM+ Thai styling
• ✅ Includes welded -10AN breather fittings (if selected)
• ✅ Direct replacement for factory cover (Euro 4 4JJ1 / 4JJ3)

• 💸 Buy Now, Pay Later: Afterpay, Humm, Klarna & Zip available
• ✈️ Free Express Shipping Australia-Wide

These are very limited stock. Aluminum covers are difficult to source in Thailand, so stock is limited. Once sold out, restock times can take 1–3+ months.

Need this urgently? Send us a message before ordering to confirm availability.

Q: What colors are currently in stock?

A: As of 06/02/26: One Blue cover and one Grey cover (both with 2× -10AN breather fittings welded). All other colors available to order with 1–3 month lead time.

Q: Do all covers come with -10AN breather fittings?

A: Can be ordered with 2× -10AN breather fittings welded to cover. Check product options when ordering.

Q: How do I know if this fits my engine?

A: This suits Euro 4 4JJ1 and 4JJ3 engines with 4 bolts across the front edge of the rocker cover. If unsure, send us your VIN or rego.

Q: Will this fit 4JJ1 Pre-DPF or 4JJ1-TC?

A: This is specifically for Euro 4 4JJ1 with 4 front bolts and all 4JJ3 engines. Pre-Euro 4 models may have different bolt patterns.

Q: When will more stock arrive?

A: Aluminum covers are very difficult to source in Thailand. Restock times vary but can take 1–3 months. Contact us for latest ETA.