GM Performance Rocker Arms | LS7 1.8 Ratio LS 347ci LS1 Forged Engine Upgrade The alternative is the MSD

The alternative is the MSD fuel pump voltage booster

- Valve Springs Kit Of Your Choice

- YOUR LSA Cylinder Heads

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GM Performance Rocker Arms | LS7 1.8 Ratio LS 347ci LS1 Forged Engine Upgrade The alternative is the MSDGM Performance Rocker Arms LS7 Get smooth valvetrain performance with GM Performance LS7 Rocker Arms. The GM Performance LS7 Rocker Arms feature a high performance 1. 8 ratio with a cast iron housing & fulcrum roller. Your New GM Performance Rocker Arms Kit Includes 8 x GM Performance Intake Rocker Arms; 8 x GM Performance Exhaust Rocker Arms; Will These GM Performance Rocker Arms Kit Fit My Heads? LS7 Only;