Product Description
ARP 230-2901 FLEXPLATE BOLT KIT FOR 2001–2010 GM 6.6L DURAMAX
Lock down the flexplate on your 6.6L Duramax with the ARP 230-2901 Pro Series Flexplate Bolt Kit. Engineered for repeatable clamp load and superior strength, these M16 x 1.50, 12-point bolts feature a larger-than-stock under-head radius and precise machining to keep your drivetrain secure under towing, racing, or daily use.
Fitment
- 2001–2010 GM 6.6L Duramax: LB7, LLY, LBZ, LMM (typically with Allison 1000 automatic transmission)
- Chevrolet Silverado 2500HD/3500HD & GMC Sierra 2500HD/3500HD
Cross Reference & Related ARP Products (CPP Diesel)
- ARP 230-2801 Flywheel Bolt Kit (2001–2007 Duramax)
- ARP 230-5401 Main Stud Kit (2001–2005 LB7/LLY)
- ARP 230-5402 Main Stud Kit (2006–2010 LBZ/LMM)
- ARP 230-4201 Head Stud Kit (2001–2016 LB7/LLY/LBZ/LMM/LML)
- ARP 129-2503 Balancer Bolt Kit (2001–2019)
- ARP 230-6301 Connecting Rod Bolt Kit (2001–2010)
FAQ
WHAT ENGINES DOES ARP 230-2901 FIT?
2001–2010 GM 6.6L Duramax LB7, LLY, LBZ, LMM.
WHAT ARE THE KEY SPECS?
M16 x 1.50 thread, 12-point head (5/8" socket), 1.775" under-head length (UHL).
IS THERE A PROP 65 WARNING?
Yes. California residents: Cancer warning applies.
CAN I REUSE FACTORY FLEXPLATE BOLTS?
Factory bolts are typically torque-to-yield and not recommended for reuse. ARP hardware is designed for consistent, repeatable torque.
Specifications for ARP 230-2901
| Brand | ARP |
| Part Number | 230-2901 |
| Thread Size | M16 x 1.50 |
| Head Style / Socket | 12-Point / 5/8" socket |
| Under-Head Length (UHL) | 1.775" |
| UPC | 672036039196 |
| GTIN (14) | 00672036039196 |
| Shipping Info | Shipping calculated at checkout |
| Cross Reference | 230-2801 (Flywheel Bolts), 230-5401 (Main Studs LB7/LLY), 230-5402 (Main Studs LBZ/LMM), 230-4201 (Head Studs), 129-2503 (Balancer Bolt), 230-6301 (Rod Bolts) |
| E-Codes | N/A |
| Prop 65 | Yes – Cancer warning (California) |
