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18° Big Chief heads with Manley NexTek 1.677" Triple Springs and Titanium Valves and Retainers. The most powerful "Nitrous Friendly" 18° Head available today!

• Titanium Valves • 1.677" Manley NexTek Triple Roller Springs • 10° Titanium Retainers • 10° Locks • Spring Cups • Installed Height Set • Viton Seals
Specifications
• Porting: Fully CNC Ported
• Chambers: 89cc (85 - 98cc Available)
• Intake Runner: 425cc
• Intake Valve: 2.400" Titanium
• Exhaust Valve: 1.900" Titanium
• Springs: 1.677" Manley Nextek Triple Roller
• Retainers: 10° Titanium
Options
CC and Mill Chambers $ Call