Summit Racing SpeedCard - learn how to get 15% back up to $150

Summit Racing SpeedCard - learn how to get 15% back up to $150

It's the Season for Savings - Shop Holiday Deals Now!

Selected Filters


Loading...

Availability


Manley Severe Duty Series Stainless Steel Valves

4.94 out of 5 stars 17 Customer Reviews

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.

Results 1 - 25 of 106

Valve, Intake, Stainless Steel, 2.300 in. Diameter, .341 in. Stem, 5.494 in. Length, Chevy, Each

Part Number: MAN-11854-1

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Valve, Exhaust, Stainless Steel, 1.880 in. Diameter, .341 in. Stem, 5.422 in. Length, Chevy, Each

Part Number: MAN-11843-1

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Valve, Exhaust, Stainless Steel, 1.600 in. Diameter, .341 in. Stem, 5.036 in. Length, Chevy, Each

Part Number: MAN-11539-1

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Valves, Intake, NK-844, 2.350 in. Diameter, 0.342 in. Stem, 5.610 in. Length, Chevy, Set of 8

Part Number: MAN-11880-1

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Valve, Exhaust, Stainless Steel, 1.880 in. Diameter, .341 in. Stem, 5.522 in. Length, Chevy, Each

Part Number: MAN-11815-1

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Valve, Intake, NK-844 Stainless, 2.250 in. Diameter, .3085 in. Stem, 5.424 in. Length, Each

Part Number: MAN-11904-1

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valve, Intake, Stainless Steel, 2.250 in. Diameter, .341 in. Stem, 5.344 in. Length, Chevy, Each

Part Number: MAN-11850-1

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Valve, Intake, Stainless Steel, 2.250 in. Diameter, .341 in. Stem, 5.494 in. Length, Chevy, Each

Part Number: MAN-11856-1

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Valves, Exhaust, XH-428 Stainless, 1.610 in. Head Diameter, 5.230 in. Length, Chevy, 7.0L LS, Set of 8

Part Number: MAN-11679-1

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valve, Exhaust, XH-428 Stainless Steel, 1.625 in. Head Diameter, 5.465 in. Length, Chevy, Small Block, Each

Part Number: MAN-11511-1

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

VALVE-S/D 1.625,+.100

Part Number: MAN-11851-1

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valve, Intake, Stainless Steel, 2.300 in. Diameter, .341 in. Stem, 5.610 in. Length, Chevy, Each

Part Number: MAN-11878-1

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Valve, Exhaust, Stainless Steel, 1.600 in. Diameter, .341 in. Stem, 4.911 in. Length, Chevy, Each

Part Number: MAN-11543-1

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valves, VALVE-BRODIX BB 383 1.850

Part Number: MAN-12339-1

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Valve, Exhaust, Stainless Steel, 1.600 in. Diameter, .3415 in. Stem, 4.921 in. Length, Each

Part Number: MAN-11551-1

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valve, Intake, Stainless Steel, 2.020 in. Diameter, .341 in. Stem, 4.911 in. Length, Chevy, Each

Part Number: MAN-11596-1

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valve, Exhaust, Stainless Steel, 1.500 in. Diameter, .342 in. Stem, 4.911 in. Length, Universal, Each

Part Number: MAN-11567-1

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valve, Exhaust, Severe Duty, Stainless Steel, 1.880 in. Diameter, 0.342 in. Stem, 5.655 in. Length, Each

Part Number: MAN-11591-1

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Valves, Exhaust, Stainless Steel, 1.940 in. Diameter, .3415 in. Stem, 5.140 in. Length, Chevy, Small Block, Each

Part Number: MAN-11748-1

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valve, Intake, Severe Duty, Stainless Steel, 1.937 in. Diameter, 0.342 in. Stem, 4.911 in. Length, Each

Part Number: MAN-11592-1

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valve, Exhaust, Stainless Steel, 4.725 in. Length, 1.500 in. Diameter, 0.3415 in. Diameter Stem, Buick V6, Each

Part Number: MAN-11503-1

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valve, Exhaust, Severe Duty, Stainless Steel, 1.600 in. Diameter, 0.3415 in. Stem, 5.565 in. Length, Each

Part Number: MAN-11767-1

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valve, Exhaust, XH-428 Stainless, 1.900 in. Head Diameter, 5.522 in. Length, Chevy, Big Block, Each

Part Number: MAN-11847-1

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valve, Intake, Stainless Steel, 2.250 in. Head Diameter, 5.594 in. Length, Chevy, Big Block, Each

Part Number: MAN-12898-1

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Valve, Exhaust, Stainless Steel, 1.880 in. Diameter, .341 in. Stem, 5.522 in. Length, Chevy, Each

Part Number: MAN-11845-1

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Modal Header

Call To Order

This is a custom order part. You can order this part by Contacting Us.