⚙️ Upgrade your engine’s heartbeat with GM precision – don’t let your ride miss a beat!
The ACDelco HL123 Hydraulic Valve Adjuster is a GM-recommended, original equipment replacement part designed to maintain zero valve lash automatically. Manufactured to GM OE specifications, it ensures precise fit, reduces valve train noise, and extends engine component life, delivering reliable and durable performance for your GM vehicle.
| Brand | ACDelco |
| Item dimensions L x W x H | 8.5 x 2.9 x 1.1 inches |
| Exterior Finish | Machined |
| Inlet Connection Size | 3.5 Inches |
| Inlet Connection Type | Oil |
| Outlet Connection Type | Oil |
| Number of Ports | 2 |
| Outlet Connection Size | 3.5 Inches |
| Specification Met | Yes, meets GM OE specifications |
| Valve Type | lift valve |
| Global Trade Identification Number | 00036666641172 |
| Manufacturer | ACDelco |
| UPC | 036666641172 |
| Model | Valve Lifter |
| Item Weight | 3.2 ounces |
| Product Dimensions | 8.5 x 2.9 x 1.1 inches |
| Item model number | HL123 |
| Is Discontinued By Manufacturer | Yes |
| Manufacturer Part Number | HL123 |
| OEM Part Number | 17120735 |
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