Manley Severe Duty Exhaust Valves Chevy LS3 11661-8

Manley Severe Duty Valves are made with XH-428 Stainless. They feature chrome stems, hard tips, swirl polished, and machined heads. The intakes are PRO FLO for improved flow. They also use a OE style radius keeper grooves.

• Brand: Manley
• Manufacturer Part Number: 11661-8
• Type: Exhaust
• Head Diameter: 1.590"
• Stem Diameter: .3136"
• Installed Height: Stock
• Overall Length: 4.923"
• Tip Length: .160"
• Underhead Angle / Radius: 25 Degree x 7/16"
• Margin: .070
• Seat Width: .115
• Top of Head: 18 Degree Dish
• Weight: 94g