HPD Special Parts
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Give your 4JJ1 engine bay a clean, high-end finish with this HPD Stainless Bolt & Anodised Washer Set, imported directly from Thailand. Premium hardware designed to enhance HPD alloy rocker covers or refresh your factory rocker cover with show-quality presentation.
Whether you're building a show truck, maintaining your pride and joy, or completing an HPD rocker cover installation, this 14-piece bolt and washer set delivers the authentic HPD Special Parts quality that enthusiasts demand.
This complete hardware kit includes everything needed to mount your 4JJ1 rocker cover with distinctive HPD style. Each set features precision-engineered stainless steel bolts with a polished finish, paired with anodised washers available in multiple colour options to match your engine bay theme.
Key Features:
Complete 14-piece rocker cover hardware set:
Select your preferred anodised washer colour when ordering. Popular options include blue, red, gold, purple, and more. Contact us if you need a specific colour confirmation.
This HPD bolt and washer set is engineered specifically for the Isuzu 4JJ1-TC 3.0L turbo diesel engine found in:
Compatible with both HPD alloy rocker covers and OEM factory rocker covers.
Q: Are these genuine HPD Special Parts?
A: Yes! These are authentic Thai-imported HPD Special Parts hardware, not generic copies. HPD (High Performance Diesel) is a respected Thai manufacturer known for quality aftermarket performance and styling components throughout Asia and Australia.
Q: What does "Thai Import" mean?
A: HPD manufactures these components in Thailand to exacting quality standards. The Thai automotive aftermarket is renowned for precision engineering and quality finishes. We import these directly from HPD's Thailand facility.
Q: How does the quality compare to OEM bolts?
A: The HPD stainless steel bolts offer superior corrosion resistance and a premium polished finish compared to standard factory hardware. The anodised washers add a distinctive custom appearance not available from factory.
Q: Do these fit HPD alloy rocker covers?
A: Yes — this kit is designed to perfectly suit HPD alloy rocker covers. It's also compatible with OEM factory rocker covers if you want to upgrade your stock hardware.
Q: Will these fit my 4JJ1 engine?
A: If you have a Holden RA7 Rodeo (2007-2008), Holden Colorado RC (2008-2012), or Isuzu D-MAX (2006-2012) with the 4JJ1-TC 3.0L engine, yes — these are direct replacements for your rocker cover bolts.
Q: Can I use these on a different engine?
A: These are specifically engineered for the 4JJ1-TC rocker cover bolt pattern and thread specifications. We don't recommend using them on other engines without confirming compatibility.
Q: Are any special tools required for installation?
A: No special tools needed — standard socket set is sufficient. Follow proper torque specifications when installing rocker cover bolts to avoid leaks or damage.
Q: Can I choose the anodised washer colour?
A: Yes! Simply select your desired anodised washer colour before checkout. We offer multiple colour options to match your engine bay theme.
Q: What colours are available?
A: Common colours include blue, red, gold, purple, black, and more. If you need a specific colour confirmed before ordering, contact us with your preference.
Q: Will the anodised finish fade over time?
A: Quality anodising is durable, but engine bay heat can cause some colour fading over extended periods. The washers will remain corrosion-resistant and functional regardless of minor colour changes.
Q: Can I mix colours or order different colours later?
A: Each kit comes with one colour of anodised washers (14 matching washers). If you want to mix colours for a custom look, contact us and we can discuss custom combinations.
Q: Are these stronger than factory bolts?
A: They provide similar strength to OEM hardware with the added benefits of stainless steel construction (superior corrosion resistance) and upgraded appearance. These meet or exceed factory specifications.
Q: Will stainless steel bolts work in an aluminium rocker cover?
A: Yes — stainless steel is commonly used with aluminium components. The included washers help distribute load and prevent galvanic corrosion.
Q: Do I need to use thread sealant?
A: Follow the same installation procedures as your original rocker cover. Typically, rocker cover bolts don't require thread sealant, but always use a proper rocker cover gasket and follow manufacturer torque specifications.
Q: How quickly will this ship?
A: Most orders ship within 1-2 business days if in stock. Free express shipping applies to all Australian deliveries.
Q: Do you ship to rural areas?
A: Yes! Free express shipping covers all of Australia, including rural and remote locations.
Q: Can I return these if they don't fit?
A: Items must be unused and in original packaging for returns. Please confirm compatibility with your specific vehicle before ordering. If you're unsure about fitment, contact us first.
Q: Can I order just the bolts or just the washers?
A: This is a complete 14-piece set (14 bolts + 14 washers). If you need a different configuration, contact us and we'll see what we can arrange.
Q: Can I use these with my stock rocker cover?
A: Absolutely! These bolts upgrade the appearance of your factory rocker cover while maintaining proper function. Great way to add a custom touch without major modifications.
Q: Do these come with installation instructions?
A: These are direct bolt-in replacements. Remove old bolts, install new HPD bolts with washers using proper torque specifications. Consult a workshop manual for specific torque values if unsure.
Q: Will these make my engine bay look better?
A: Definitely! The polished stainless bolts and anodised washers create a clean, high-end appearance that stands out in any engine bay. Popular choice for show trucks and pride-of-ownership builds.
Authentic HPD quality from Thailand. Premium hardware for show-quality presentation.
