Manley Performance Extreme Duty Exhaust Valves LS Next2 The center counterweights of the

The center counterweights of the Callies crankshaft increases its stiffness by 25% and reduces harmonics

Coupling this Hi–Ram intake with the high flowing style cylinder heads has outstanding potential for N/A and forced induction applications at a budget–minded cost

Installed in the inlet passages at the base of the Phantom Bladder

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This engine delivers a lot of horsepower in a complete

Manley Performance Extreme Duty Exhaust Valves LS Next2 The center counterweights of theManley Performance Extreme Duty Exhaust Valves for LS1 LS2 LS6 consists of: 1. 600" Head Diameter . 3136" Stem Diameter Hard Coated w . 0002" thick Chrome Stems High Temperature Strength Swirl Polished & Fully Machined Sold in sets of 8