

🔧 Lock in performance, unlock your engine’s potential!
The ARP 129-2503 Dampener Bolt is a high-performance, stainless steel fastener engineered with Grade 10.9 hardness and a maximum shear strength of 126,480 psi. Designed for GM Duramax engines, it features precision metric coarse pitch threads and a corrosion-resistant finish. Made in the USA, this bolt is trusted by top-tier motorsport teams for durability and reliability under extreme conditions.
| Material | Stainless Steel |
| Exterior Finish | Stainless Steel |
| Manufacturer Grade | Performance Part |
| Head Style | Round |
| Fastener Type | Dampener Bolt |
| Brand | ARP |
| Thread Type | Metric Coarse Pitch |
| Thread Style | Right Hand |
| Item Hardness | Grade 10.9 |
| Metal Type | Stainless Steel |
| Head Type | Hex |
| Maximum Shear Strength | 126,480 psi |
| Number of Pieces | 1 |
| UPC | 672036046835 |
| Global Trade Identification Number | 00672036046835 |
| Manufacturer | ARP |
| Model | ARP |
| Product Dimensions | 14.73 x 25.65 x 4.45 cm; 240 g |
| Item model number | 129-2503 |
| Manufacturer Part Number | 129-2503 |
| Assembly Required | No |
| Country of Origin | USA |
| Item Weight | 240 g |
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