Manley Chevrolet L-99 intake Valve Kit - 2.165in Head Dia. 5.200in O/A Length, 0.3133in Stem - 12354H-8

Manley Severe Duty® Valves deliver the ultimate in strength, reliability, and high-performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH-428 for exhaust and NK-844 for intake),...

Manley Chevrolet LS1intake Valve Kit - 2.000in Head Dia. 4.874in O/A Length, 0.3133in Stem - 11360H-8

Manley?s Race Series valves are meticulously engineered to meet the rigorous demands of bracket, drag, and oval track racers and are the ultimate choice for engines operating under 8000 RPMThis Part...

Manley Chevrolet LS1intake Valve Kit - 2.020in Head Dia. 4.874in O/A Length, 0.3133in Stem - 11362H-8

Manley?s Race Series valves are meticulously engineered to meet the rigorous demands of bracket, drag, and oval track racers and are the ultimate choice for engines operating under 8000 RPMThis Part...

Manley Chevrolet LS1intake Valve Kit - 2.055in Head Dia. 4.874in O/A Length, 0.3133in Stem - 11390H-8

Manley?s Race Series valves are meticulously engineered to meet the rigorous demands of bracket, drag, and oval track racers and are the ultimate choice for engines operating under 8000 RPMThis Part...

Manley Chevrolet LS1intake Valve Kit - 2.055in Head Dia. 4.874in O/A Length, 0.3133in Stem - 11680H-8

Manley Severe Duty® Valves deliver the ultimate in strength, reliability, and high-performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH-428 for exhaust and NK-844 for intake),...

Manley Chevrolet LS1intake Valve Kit - 2.080in Head Dia. 4.874in O/A Length, 0.3133in Stem - 11398H-8

Manley?s Race Series valves are meticulously engineered to meet the rigorous demands of bracket, drag, and oval track racers and are the ultimate choice for engines operating under 8000 RPMThis Part...

Manley Chevrolet LS1intake Valve Kit - 2.080in Head Dia. 4.874in O/A Length, 0.3133in Stem - 11682-8

Manley Severe Duty® Valves deliver the ultimate in strength, reliability, and high-performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH-428 for exhaust and NK-844 for intake),...

Manley Chevrolet LS1intake Valve Kit - 2.100in Head Dia. 4.874in O/A Length, 0.3133in Stem - 11350H-8

Manley?s Race Series valves are meticulously engineered to meet the rigorous demands of bracket, drag, and oval track racers and are the ultimate choice for engines operating under 8000 RPMThis Part...

Manley Chevrolet LS1intake Valve Kit - 2.100in Head Dia. 4.874in O/A Length, 0.3133in Stem - 11684H-8

Manley Severe Duty® Valves deliver the ultimate in strength, reliability, and high-performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH-428 for exhaust and NK-844 for intake),...

Manley Chevrolet LS3 L-99 (L-92 Head) 1.600in Head Diameter Race Master Exhaust Valves (Set of 8) - 12353-8

Manley?s Race Series valves are meticulously engineered to meet the rigorous demands of bracket, drag, and oval track racers and are the ultimate choice for engines operating under 8000 RPM

Manley Chevrolet LS7 intake Valve Kit - 2.205in Head Dia. 5.200in O/A Length, 0.3133in Stem - 11688H-8

Manley Severe Duty® Valves deliver the ultimate in strength, reliability, and high-performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH-428 for exhaust and NK-844 for intake),...

Manley Chevrolet LT1 6.2L 1.590in Head Diameter Race Master Exhaust Valve - Single - 12345-1

Manley?s Race Series valves are meticulously engineered to meet the rigorous demands of bracket, drag, and oval track racers and are the ultimate choice for engines operating under 8000 RPM