Home / Shop / Manley Extreme Duty Series Stainless Steel Valves 11855-1 Valve, Exhaust, XH-432 Xtreme Alloy, 2.000 in. Head Diameter, 5.020 in. Length, Each

Manley Extreme Duty Series Stainless Steel Valves 11855-1 Valve, Exhaust, XH-432 Xtreme Alloy, 2.000 in. Head Diameter, 5.020 in. Length, Each

SKU: MAN11855-1

Valves

Manley Performance

Manley Extreme Duty Series Stainless Steel Valves 11855-1 Valve, Exhaust, XH-432 Xtreme Alloy, 2.000 in. Head Diameter, 5.020 in. Length, Each

SKU: MAN11855-1

Valves

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Description

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.

Part Type

Valves

Data: v4.2 - Upd: 2026-10-14 10:10:45

Specifications

Product Attributes - Brand: Manley
Product Attributes - Manufacturer's Part Number: 11855-1
Product Attributes - Part Type: Valves
Product Attributes - Product Line: Manley Extreme Duty Series Stainless Steel Valves
Product Attributes - UPC: 807298054124
Product Attributes - Valve Position: Exhaust
Product Attributes - Exhaust Valve Head Diameter (in.): 2.000 in.
Product Attributes - Exhaust Valve Head Diameter (mm): 50.800mm
Product Attributes - Exhaust Valve Stem Diameter (in.): 0.372 in.
Product Attributes - Exhaust Valve Stem Diameter (mm): 9.50mm
Product Attributes - Exhaust Overall Valve Length (in.): 5.020 in.
Product Attributes - Exhaust Overall Valve Length (mm): 127.508mm
Product Attributes - Undercut Stem: No
Product Attributes - Swirl-Polished: Yes
Product Attributes - Valve Tip Length (in.): 0.250 in.
Product Attributes - Valve Tip Length (mm): 6.350mm
Product Attributes - Valve Material: XH-432 Xtreme alloy
Product Attributes - Lock Groove Quantity: 1-groove
Product Attributes - Lock Groove Style: Conventional
Product Attributes - Approximate Weight (g): 165
Product Attributes - Valve Head Style: 15 degree dish
Product Attributes - Valve Seat Width (in.): 0.125 in.
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Designed for top fuel and funny car applications.

Reference Information

Brand Name/s	Manley Performance
StreetFX SKU	man11855-1
SFX Item ID	4928702
Supplier Item Code	4928702
Manufacturer SKU	11855-1
Manufacturer UPC	807298054124
Alternative References	XH-432