Automotive fastening hardware engineered to reduce flexplate failures in high-torque engines, the ARP Pro Series Flexplate Bolt Kit brings aerospace-grade strength to the crank-to-flexplate connection. That reassurance helps owners and builders tackle demanding road and track use with confidence. Are these bolts the sensible upgrade for everyday cars or best reserved for performance builds?
⚡ At a Glance
- • Tensile Strength: Rated at 200,000 PSI, considerably stronger than Grade 8 hardware
- • Best for: Engine builders and performance tuners seeking higher clamp reliability
- • Not ideal for: Owners who prefer to keep entirely OEM-spec fasteners
Forged from aerospace alloy and heat-treated prior to thread rolling and machining. .500 under head length with 1/2-20 thread size, complete with washers and nuts where applicable.
Secure crank-to-flexplate clamping - thanks to forged aerospace-alloy construction
Forged aerospace-alloy blanks undergo heat treatment before thread rolling and final machining, producing a dense grain structure and stronger thread form. Thread rolling preserves the material's fatigue resistance compared with cut threads.
Higher clamp strength resists shearing and fatigue under repeated torque cycles, reducing the chance of fastener failure in demanding use.
Consistent thread engagement - with 1/2-20 thread size and controlled under-head length
Specified 1/2-20 thread profile and .500 inches of under-head length ensure predictable engagement depth and seating on common flexplates. Precision machining after thread rolling maintains dimensional accuracy.
Accurate fitment lowers the risk of misalignment or uneven clamping, making installations more reliable and reducing the need for re-torquing.
Ready-to-fit kit - thanks to included washers and nuts where applicable
Kits are supplied complete with washers and nuts in configurations where they apply, removing the need to source separate hardware. Selection of matched components supports correct clamp geometry.
Simplified installation avoids mismatched parts and speeds up rebuilds or upgrades for workshop and home installations.
✨ The 4 Key Reasons for ARP Pro Series Flexplate Bolt Kit
- Forged aerospace alloy - Significantly stronger material than standard OEM fasteners
- Heat-treated before thread rolling - Improved thread durability under repeated torqueing
- 1/2-20 thread, .500 under-head length - Predictable fitment and correct clamp depth
- Includes washers and nuts where applicable - Reduces parts sourcing and simplifies installation
📋 Technical Details at a Glance
- Category: Automotive Parts and Accessories
- Brand: ARP
- Model: Pro Series Flexplate Bolt Kit
- Part Number: B000CFS1C2
- Material: Forged aerospace alloy
❓ Frequently Asked Questions
Q: Are these bolts stronger than standard Grade 8 fasteners?
A: Yes, the bolts are rated at 200,000 PSI, which the manufacturer states is considerably stronger than Grade 8 hardware.
Q: What thread size and under-head length are supplied?
A: Thread size is 1/2-20 and the under-head length is specified as .500 inches.
Q: Are washers and nuts included in the kit?
A: Kits are supplied complete with washers and nuts where applicable, so additional hardware may not be required.
🏆 Our Verdict
Engine builders, tuners and anyone replacing or upgrading flexplate fasteners will benefit from the kit's high-strength specification and thorough manufacture process. Forged aerospace-alloy construction, a 200,000 PSI rating and heat-treated, thread-rolled production deliver a clear durability advantage. Though an upgrade over standard fasteners, improved long-term reliability makes it a sensible investment for high-stress applications.
