| | |  C5 C6 Rocker Arm Master Package, 1997-2007 by SLP |
 | | We are pleased to introduce SLP's 1.85-Ratio Rocker Arm Package for GM "Gen III" Corvette engines which includes LS1, LS6, and LS2 engines. Designed as a true bolt-on replacement, this rocker package requires NO valve cover or cylinder head modifications (please reference our instructions for proper installation). Our exclusive design is based off of the stock rocker providing an OEM quality steel construction and a roller bearing trunion which results in a 10% increase in valve lift over the stock 1.7 ratio rocker arms and gains of up to 12 horsepower over stock.
This package includes: - 1.85 Ratio Rocker Arms 16 qty (50185)
- High-Performance Valve Springs 16 qty (53003)
- Titanium Retainers 16 qty (53104)
- Valve Keepers 32 qty (66345)
- New bolts 16 qty
SLP Rocker Arm Compatibility Chart (with stock camshafts)| Year | Engine | Are SLP springs & retainers required? | SLP suggested spring p/n use w/ 1.85 rockers | Intake valve lift with SLP 1.85 rockers | Exhaust valve lift with SLP 1.85 rockers |
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| 2005-07 | LS2 | Yes | 643453 | 0.600 | 0.596 | | 2002-04 | LS6 | Yes | 643453 | 0.600 | 0.596 | | 2001 | LS6 | Yes | 643453 | 0.569 | 0.568 | | 2001-04 | LS1 | No | N/A | 0.505 | 0.521 | | 2000 | LS1 | Yes | 643453 | 0.544 | 0.544 | | 1997-99 | LS1 | No | N/A | 0.514 | 0.521 | | |
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