871265 – LS1 GEN III MEDIUM CAM
| Application | RPM Range | Part No. | Adv. Duration | .050" Duration | Valve Lift | LSA | Lash Intake | Lash Exhaust | |||
| Intake | Exhaust | Intake | Exhaust | Intake | Exhaust | ||||||
| Increased mid range. Min effect on economy STD idle. (See Fitting Notes 1) | 1500-6000 | 871265 | 268 | 275 | 212 | 219 | .519" | .528" | 114 | HYD | HYD |
Recommended Parts to suit Camshaft
| Installed Height | Parts Kit | Valve Spring | Retainer | Locks | Stem Seal | Spring Seat | Lifters (See Notes) |
Timing Kit | Pushrods (See Notes) |
Rockers |
| 1.780" | VTKLS1 | 4231-16 | 10707-16 | 10701-16 | S9-16 | Not Included | 5250 | See Notes | PR-957-16 | N/A |
| 5251 | PR-5735-16 |
Parts Kit includes: Valve Springs, Retainer, Locks, Stem Seals & Spring Seats where needed.
Camshaft, Lifters, Timing Kit & Pushrods are not Included in Parts Kit. Order Separately.
Note: Springs marked with xxxx-xxD denotes that it is a double spring.
Notes: Valve Lift calculated using standard 1.70 rocker ratio. Advertised duration shown at .006". Spring installed height should be checked before ordering.
Lifter Notes: 5250 is OEM style drop in lifter using original buckets. 5251 is tie bar style lifter.
Pushrod notes: Standard pushrod length listed for reference only. Pushrod length needs to be checked on assembly prior to ordering.
Timing Kits
| Engine | Single Row | Double Row | Triggers |
| LS1, LS6 5.7L 3 Bolt Cam | CS8LS1-SR | CS8LS1 | 0 |
| LS2 6.0L 3 Bolt Cam | CS8LS2-SR | CS8LS2 | 1 |
| LS7 7.0L 3 Bolt Cam | CS8LS7-SR | CS8LS7 | 4 |
| LS3 6.2L, L76, L98 6.0L Single Bolt Cam NON AFM |
CS8LS-VE-SR | CS8L98 | 4 |
| L76, L98 3 Bolt Cam Conversion | CS8LS7-SR | CS8LS7 | 4 |
| VE 3 Bolt Gear Genuine GM | CS12586481 | 4 | |
| 3 Bolt Heavy Duty Steel Cam Gear | CS8LS-VE3 | 4 |
Fitting Notes:
1. Must use Performance Springs. 2. Must use Performance Retainers. 3. Machining Required to fit these components. 4. Must use performance seal. 5. Notes 1-4 Apply to this part number. 6. Check valve train geometry before ordering pushrods. 7. Pushrod Length varied in this model. Check length before ordering. 8. Spring height varies in models, check spring pressure before installation.
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