Manley 11688-8 Severe Duty Pro Flo Stainless Steel Intake Valves LS7 2.205

Manley Performance is known as the leading manufacturer of performance and racing valves, and their Race Master LS7 series performance valves are a great choice for bracket racing, oval track, or high-performance street engines. This set includes 8 intake valves designed for Chevy LS7 applications, featuring a 2.205-inch head diameter, .3133-inch (8mm) stem diameter, and stock height.

Premium Materials and Construction:

• Intake valves crafted from NK-844 material, which displays over four times the ultimate tensile strength of the competition's best intake valve material at 1000?F
• Made from stainless steel with chrome stems and hardened valve tips
• Swirl polished and fully machined for precision performance
• Pro-Flo design reduces stem diameter in the fillet area for increased airflow and reduced valve weight
• Features GM LS OEM style radius keeper grooves

Performance Features:

• Valve stem length: 5.200 inches
• Margin: .050 inches
• Features swirl polished under heads, completely machined combustion faces, closely controlled margin heights, and exact stem to seat concentricity
• Engineered for street performance and racing applications below 8000 RPM

Manley stainless valves are suitable for all applications ranging from the mild street performer to the jaw dropping 1000+ horsepower race cars competing at the drag strip. We strongly recommend checking valve guide size to achieve proper valve stem to guide clearance, as guides may need to be honed when replacing stock factory valves.