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Rocker-Arm Package, LS1/LS6/LS2 Camaro/Firebird/Corvette/GTO/4.8/5.3/6.0 Silverado/Sierra/SUV (1.85 ratio)
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SLP is proud to re-release their 1.85-ratio rocker arm package for GM "Gen III" engines which includes LS1, LS6, LS2 as well as 4.8, 5.3 and 6.0* (LQ4 OR LQ9) liter truck engines. Designed as a true bolt-on replacement, these new rockers require NO valve cover or cylinder head modifications (please reference SLP's instructions for proper installation). SLP's 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 16 rocker arms, detailed instructions and all required installation hardware.
This package includes:
- 1.85 Ratio Rocker Arms 16 qty (50185)
- New bolts 16 qty
NOTE 1: When using an aftermarket camshaft, please contact SLP for proper compatibility.
NOTE 2: LS1, LS6 and LS2 engines may require SLP part # 53002 or part # 53003 springs, part # 53103 or part # 53104 retainers and part # 66345 keepers. Please reference chart below for proper application and part # 51185 or part # 51186 rocker arm package when purchasing the complete package.
SLP ROCKER-ARM COMPATIBILITY CHART (with stock camshafts)
| YEAR |
APPLICATION |
ENGINE |
Are SLP springs & retainers required? |
SLP Suggested Spring P/N use w/1.85 rockers |
Intake Valve Lift with SLP 1.85 rocker |
Exhaust Valve Lift with SLP 1.85 rocker |
| 2005-07 |
C6 Corvette |
LS2 |
Yes |
53003 |
0.600 |
0.596 |
| 2002-04 |
Z06 Corvette |
LS6 |
Yes |
53003 |
0.600 |
0.596 |
| 2001 |
Z06 Corvette |
LS6 |
Yes |
53003 |
0.569 |
0.568 |
| 2001-04 |
Corvette |
LS1 |
No |
N/A |
0.505 |
0.521 |
| 2000 |
Corvette |
LS1 |
Yes |
53002 |
0.544 |
0.544 |
| 1997-99 |
Corvette |
LS1 |
No |
N/A |
0.514 |
0.521 |
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| 2001-02 |
F-Body |
LS1 |
No |
N/A |
0.505 |
0.521 |
| 1998-00 |
F-Body |
LS1 |
Yes |
53002 |
0.544 |
0.544 |
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| 2005-06 |
GTO |
LS2 |
Yes |
53003 |
0.600 |
0.596 |
| 2004 |
GTO |
LS1 |
No |
N/A |
0.505 |
0.521 |
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| 2006 |
CTS V |
LS2 |
Yes |
53003 |
0.600 |
0.596 |
| 2004-05 |
CTS V |
LS6 |
Yes |
53003 |
0.600 |
0.596 |
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| 2005-06 |
SSR Truck |
LS2 |
Yes |
53003 |
0.566 |
0.564 |
| 2006-07 |
Trailblazer SS |
LS2 |
Yes |
53003 |
0.600 |
0.596 |
| 2001-07 |
CK Truck |
LQ4, LQ9 |
No |
N/A |
0.505 |
0.521 |
| 1999-07 |
CK Truck |
LR4, LM7 |
No |
N/A |
0.497 |
0.507 |
| 1999-00 |
CK Truck |
LQ4 |
No |
N/A |
0.497 |
0.507 |
| 2003-04 |
ST Truck |
LM4 |
No |
N/A |
0.497 |
0.507 |
| 2002-05 |
CK Truck |
L59 |
No |
N/A |
0.497 |
0.507 |
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Price: $624.95
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Other Items from Engine Components
2004-05 GTO Underdrive Pulley -
Rocker-Arm Package, LS1/LS6/LS2 Camaro/Firebird/Corvette/GTO/4.8/5.3/6.0 Silverado/Sierra/SUV (1.85 ratio) -
Thermostat, 160 degree LS1 1997-03 Camaro/Firebird/GTO/Corvette/C/K Truck -
Camaro/Firebird/GTO/Corvette SLP Timing Chain, 1997-2004 LS1/LS6 Double-Roller -
Camaro/ Firebird/ GTO/Corvette SLP Oil Pump 1997-2005 LS1/LS6 Heavy-Duty -
2004 GTO 5.7 Fuel Rail Covers, Carbon Fiber -
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