This ARP Main Stud Kit replaces the factory main-cap fasteners on the 2006-and-later Chevy/GMC Duramax LBZ and LMM 6.6L diesel V8 with high-strength studs for more accurate, repeatable clamp load and better main-bearing support under boost and high cylinder pressure. Includes studs, hardened parallel-ground washers, and nuts.
| Type | Main stud kit |
| Application | Chevy/GMC Duramax LBZ/LMM 6.6L (2006+) |
| Includes | Studs, washers, nuts |
| Part Number | 230-5402 |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
