Why Upgrade to a Complete ARP Fastener Kit?
Because mixing old bolts with new parts is how builds fail in the most inconvenient ways.
The ARP 545-9501 kit gives you matched, high-quality fasteners across your engine, ensuring uniform clamping force and eliminating weak links.
It’s easy to assemble a show-quality engine when you use ARP’s handy Engine & Accessory Fastener Kit. Virtually the whole lot you wish to have comes completely organized in one convenient package (no want to care for twelve different part numbers) More importantly, every fastener is superior in strength to the OEM bolts, and also significantly better than hardware grades (even Grade 8).
Key Features
- Premium Stainless Steel Construction
Corrosion-resistant and built to survive harsh engine bay conditions. - 12-Point Head Design
Provides better tool access and more precise torque control in tight spaces. - Complete Engine Hardware Solution
Replaces critical bolts across your engine for consistent performance. - Precision Rolled Threads
Ensures accurate torque readings and reliable clamping force. - Reusable & Durable Fasteners
Designed for long-term use across multiple builds when properly maintained.
You have a selection of two premium quality materials and finishes.Traditionalists will appreciate the strength and functionality of ARP’s heat-treated 8740 Chrome Moly steel alloy bolts, which feature a black oxide finish.Those who desire a dazzling engine will indisputably prefer fasteners made of ARP’s specially alloyed Stainless 300 material, which has the additional advantage of being virtually impervious to rust and corrosion.
What’s Included – ARP 545-9501 complete engine fastener kit stainless 12 point
- Comprehensive selection of engine fasteners (bolts, nuts, washers)
- Designed to replace key OEM hardware across multiple engine components
Exact contents vary by application—this is not a “one-size-fits-all,” it’s a “one-kit-does-it-right.”
The stainless steel is polished to reach a brilliant luster, and provides a distinctive, maintenance-free environment.Each and every kit has a dozen different type fasteners, all neatly organized and labeled in protective vacuum-wrapped packages.
ARP 545-9501 complete engine fastener kit stainless 12 point – Ideal Applications
- Full engine builds and rebuilds
- Performance and boosted setups
- Engine bay restoration and dress-up
- Builders who don’t want to gamble on hardware
If you’re building it once and building it right—this is where you start.
Both materials are nominally rated at 170,000 psi tensile strength and come in both hex and 12-point heads. Please note that these kits are designed for carbureted engines. Newer EFI applications may require the purchase of additional fasteners. Engine & Accessory Fastener Kit 12Point Head Material Stainless Steel
Why It Matters
Using mixed or low-quality hardware can lead to:
- Uneven clamping force
- Torque inconsistencies
- Fastener fatigue or failure
The ARP 545-9501 kit ensures uniform strength, consistent torque, and long-term reliability across your entire engine.
Mopar B SS 12pt Accessory Kit
Part number: ARP-545-9501
Installation Notes
- Follow ARP torque specs for each application
- Use ARP Ultra-Torque lubricant where required
- Verify compatibility with your specific engine setup
Translation: this kit does the hard part—you still need to install it correctly.
Fit type: Vehicle Specific
Package Weight: 4.35 pounds
Final Verdict
The ARP 545-9501 Complete Engine Fastener Kit is for builders who don’t cut corners. It delivers strength, consistency, and a clean, professional finish across your entire engine.
Not cheap—but neither is doing it twice.
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