Spool Performance 8HP45 / 8HP50 / 8HP51 upgraded billet 7075-T6 D Clutch Drum
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- 3rd-Party Tested
Spool Performance 8HP45 / 8HP50 / 8HP51 upgraded billet 7075-T6 D Clutch Drum
The factory A380 cast-aluminum D-drum in the ZF 8HP45/50/51 is one of the weak links once power levels rise—prone to cracking, distortion, and oil starvation under high load and high RPM clutch events. Spool Performance eliminates that limitation with a fully CNC-machined billet 7075-T6 D Clutch Drum, engineered for extreme durability and precise hydraulic control in high-horsepower builds.
Why 7075-T6? Superior Strength Where It Matters
Most OEM drums use A380 cast aluminum, chosen for cost—not strength. By contrast, 7075-T6 aerospace-grade billet aluminum delivers:
Massive Strength Increase Over A380
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7075-T6 tensile strength: ~74–78 ksi
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A380 cast aluminum: ~46 ksi
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Result: Significantly higher resistance to cracking, deformation, and fatigue under aggressive clutch pressure spikes.
Why not Steel? - Half the Weight of Steel, Similar Strength
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Steel drums are strong but heavy, increasing rotational inertia.
- Deep Anodizing on the 7075-T6 brings its hardness to the same level as the clutch steels preventing teeth deformation.
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7075-T6 offers near-steel strength at a fraction of the weight, improving drivetrain responsiveness and shift speed.
Better Heat Dissipation
7075 conducts heat more efficiently than steel, helping stabilize clutch pack temperatures during repeated high-load gear changes.
Precision Billet Machining for Performance
Our D drum is fully CNC-machined from a solid 7075-T6 billet, ensuring:
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Perfect roundness (no casting porosity)
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Consistent wall thickness
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Zero structural voids
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Increased clutch apply stability at high line pressures
This means cleaner, faster clutch engagement with drastically improved durability.
Improved Oil Pathways = Better Cooling & Apply Control
The Spool Performance upgraded drum integrates re-engineered oil feeds and flow channels, providing:
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More efficient fluid delivery to the clutch pack
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Enhanced cooling, reducing clutch heat soak during hard driving
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Better lubrication coverage, preventing hot spots and friction-surface distortion
These improvements directly translate to longer clutch life and higher power tolerance.
Whether you’re running upgraded turbos, ethanol, or launching heavy AWD setups, this drum is designed to withstand the load and hydraulic pressure that overwhelm the stock A380 unit.
Shipping Methods
At OEM Car Parts USA, we are committed to ensuring that your orders reach you quickly and safely. To provide you with reliable delivery options, we use trusted carriers including UPS, USPS, and FedEx.
Shipping Times
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Standard Shipping: Most orders are processed and shipped within 1-2 business days. Delivery times vary based on your location, but you can generally expect to receive your order within 3-7 business days after it has been shipped.
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Expedited Shipping: If you need your parts faster, we offer expedited shipping options. Depending on your choice, delivery times can range from 1-3 business days. Expedited shipping rates will be calculated at checkout.
Shipping Costs
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Standard Shipping: Enjoy free standard shipping on all orders within the United States. We believe in providing value to our customers without additional shipping costs.
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Expedited Shipping: The cost for expedited shipping will be calculated based on the weight of your order and your delivery location. You will be able to review the shipping cost before finalizing your purchase.
Order Processing
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Order Confirmation: After placing your order, you will receive a confirmation email with your order details and tracking number.
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Tracking Your Order: Once your order has shipped, you will receive an email with a tracking number and a link to track your shipment through UPS, USPS, or FedEx. You can use this information to monitor your order’s progress until it arrives.
Shipping Restrictions
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Delivery Locations: We currently ship to addresses within the United States. Unfortunately, we do not offer international shipping at this time.
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P.O. Box Addresses: For security reasons, we recommend providing a physical address for delivery. While we can ship to P.O. Box addresses, please note that some shipping carriers may have limitations or additional processing times.
Missing or Damaged Orders
If your order is missing or arrives damaged, please contact our customer service team at info@oemcarpartsus.com or call us at +1 (934) 201-2903 within 5 business days of receiving your shipment. We will work promptly to resolve any issues and ensure your satisfaction.
Contact Us
For any questions or further assistance regarding shipping, please don’t hesitate to reach out to us:
- Email: info@oemcarpartsus.com
- Phone: +1 (934) 201-2903
We are here to ensure a smooth and enjoyable shopping experience. Thank you for choosing OEM Car Parts USA!
Frequently Asked Questions (FAQs)
Are OEM products more expensive than aftermarket alternatives?
OEM products might have a higher upfront cost compared to aftermarket parts, but their superior quality and durability often make them a more cost-effective choice over time. Investing in OEM ensures you’re getting parts specifically designed for your vehicle, which can lead to better performance and longevity.
Can I purchase OEM parts online or do I need to visit a dealership?
You don’t need to visit a dealership to get OEM parts. You can conveniently purchase genuine OEM components from authorized distributors and reputable online retailers like OEM Car Parts USA. Our online store provides a wide selection of high-quality parts delivered straight to your door.
Are parts from brands like Mopar, ACDelco, and Motorcraft interchangeable between different vehicle brands?
No, parts from Mopar, ACDelco, and Motorcraft are typically designed for specific vehicle brands. It’s crucial to ensure compatibility with your vehicle’s make and model by checking part numbers and consulting with a knowledgeable expert.
Can I install OEM parts myself, or is it better to have a professional handle it?
While some OEM parts can be installed by DIY enthusiasts, the complexity of installation can vary. For the best results and to ensure proper fitment and performance, we recommend having a trained mechanic install the parts, especially if you’re unfamiliar with automotive repairs.
Do OEM parts come with a warranty?
Yes, many OEM auto parts come with a manufacturer’s warranty that covers defects or issues. Be sure to check the warranty details for each part at the time of purchase, and keep your receipt for any potential warranty claims.
How can I verify that I’m buying genuine OEM parts and avoid counterfeits?
To ensure you’re purchasing genuine OEM parts, look for official logos and part numbers on the packaging. Always buy from authorized dealers or well-established online retailers like OEM Car Parts USA. This helps guarantee that you’re getting authentic parts that meet the highest standards.