Availability
Manley Severe Duty series performance valves are a great choice for your high performance or race engine. All valves are made from stainless steel (intakes are NK-844; exhausts are XH-428) with chrome stems and hardened valve tips. Severe Duty series valves are made of superior materials, are fully machined and swirl polished, and are available with either undercut "Pro Flo" stems or straight stems.
( 17 )
$281.10
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$489.59
Manley Extreme Duty Series performance steel valves are a great choice for supercharged, alcohol-burning, or high-revving engines. These engines generate a lot of heat and require special valves that can handle that kind of punishment. All valves are made from the best stainless steel available, with chrome stems and hardened valve tips. Extreme Duty Series valves are swirl-polished and fully machined and available with either undercut heads or straight stems.
( 2 )
$286.72
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$522.23
Manley Severe Duty Pro Flo Series intake and exhaust valves are a great choice for your high performance or race engine. All valves are made from stainless steel (intakes are NK-844; exhausts are XH-428) with chrome stems and hardened valve tips. Severe Duty series valves are fully machined and swirl polished, and offer improved flow with undercut "Pro Flo" stems. Many size options are available, for applications from 1955 and up.
( 5 )
$286.72
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$296.64
Manley Race series performance valves are a great choice for your bracket, oval track, or high performance street engine. All valves are made from stainless steel (intakes are NK-842; exhausts are XH-426) with chrome stems and hardened valve tips. In addition to being made from high-quality materials, Race series valves are swirl polished and fully machined.
( 75 )
$286.72
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$537.42
Manley Race Master valves are designed and engineered to withstand the abuse of the track. Race Master valves are targeted by the bracket, drag, and oval track racers, or even those with modified street engines that are operating at engine speeds below 8,000 rpm. These valves are constructed from XH-426 material for the exhaust and NK-842 for the intake valves, making them the strongest valves in their class. Whether everything is on the line at the track, or you just enjoy your high performance car or motorcycle on the street, trust Race Master valves by Manley to keep you on the move. Order the model designed for your vehicle year/make and engine application.
( 5 )
$489.59
Do you have a boosted, high-heat, high-horsepower engine? Manley offers custom race valves for your high performance engine. These Race Series Gen II custom valves are manufactured from XH-426 (exhaust) and NK-842 (intake) materials with hard tips and hardened grooves. They are tailored to length, groove position, head diameter, margin, and other specifications that you request when ordering. So, whether you're building an engine or are a serious racer, Manley is committed to seeing that you're there at the finish.
Not Yet Reviewed
$344.33
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$1,516.01
These Severe Duty Gen II custom valves with unmatched strength and superiority are the only valves of their kind. Exhaust material XH-428 and intake material NK-844 are paired together for ultimate dominance over all others. With four times the tensile strength of competitors' intake valves and supremely better fatigue life, Manley Severe Duty Gen II custom valves truly show their commitment to seeing that you're there at the finish. You decide the head diameter and seat and margin widths, as well as valve length, groove type, and location for the perfect custom setup!
Not Yet Reviewed
$430.39
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$704.19
These Manley NexTek valve springs are better-designed valve springs using state-of-the-art machinery for purpose-built racing engines. They're manufactured from super-clean, high-tensile chrome silicon steel and are shot-peened to MIL specs for maximum fatigue life. They feature a proprietary, multi-step heat-treating that minimizes load loss and have computer-aided modeling to minimize valve bounce and valve gear separation. The Manley NexTek valve springs are smaller diameter and lightweight, allowing engines to rev higher faster. They have an extended tip thickness designed to eliminate overload breakage, and their tightly controlled open-end flatness reduces valve stem side loading.
( 4 )
$291.29
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$529.04
Manley titanium valve spring retainers are a great way to lighten your valvetrain, in order to rev higher and make more power. They're manufactured in Manley's own CNC turning centers from special heat-treated 6Al-4V titanium alloy, selected to deliver maximum strength and reliability. These retainers are excellent for all types of racing.
( 5 )
$252.27
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$504.52
Manley Professional valve springs are constructed from silicon material for oval track racing, or H-11 tool steel for drag racing. No matter what kind of racing you do, Manley has got you covered!
( 3 )
$265.44
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$439.27
Manley NexTek valve spring and retainer kits are designed and manufactured for optimum consistency, run after run, lap after lap. They are manufactured from super clean high-tensile chrome silicon steel that has been shot peened to MIL specs for maximum fatigue life. Proven to have less load loss than many other springs, they exhibit superior fatigue life and enhance valvetrain stability--everything that counts in winning races!
( 1 )
$346.99
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$474.99
Manley TensileMax steel valve spring retainers are designed for serious engine builders. They're as light as standard titanium retainers and within 2 to 4 grams of lightweight titanium versions. The tough alloy retainers are specially heat-treated to provide a hardness of Rc 52-54 and prevent retainer wear. Manley's exclusive process yields a part that delivers optimum balance between ultimate strength, fatigue strength, hardness, and ductility. A unique impingement process developed specifically for the TensileMax alloy and hardness range improves fatigue strength and promotes better oiling between the engine valve spring and retainer. They are available in a variety of sizes, individually or in larger sets.
Not Yet Reviewed
$471.12
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$541.99
Manley Super 7 Degree valve spring retainers are designed to complement your high performance valvetrain. These retainers are made of extremely tough, yet lightweight, heat-treated titanium that can stand up to the abuse of high performance engines. You get to choose between the standard or lightweight version, as well as with or without Manley's exclusive surface impingement that adds strength and durability. These retainers are available for a variety of spring combinations, so you can find the set that will be perfect for your next build. Don't settle for less on your next build--go with these Manley Super 7 Degree valve spring retainers!
Not Yet Reviewed
$402.28
Wound from super-clean alloy, Manley sport compact valve springs are designed to handle the demands of aftermarket camshafts. Several applications are available to suit your needs.
( 2 )
$278.24
Made of titanium, these retainers will let you squeeze more RPM out of your engine and lighten up on your valve springs to avoid valve float. Manley lightweight titanium retainers do not sacrifice reliabity and weigh up to 5 grams less then a comparable steel piece.
Not Yet Reviewed
$267.54
Here's a great tip for your valves--Manley TensileMax valve wear caps. They are precision-machined from TensileMax UHSS (Ultra-High Strength Steel) and through-hardened to HRc59-61 to minimize wear due to aggressive rocker contact. The proprietary heat-treatment processes will also minimize distortion. Choose the proper valve stem diameter for your valves.
Not Yet Reviewed
$251.84
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