Manley Race Master Valves 11870-1 VALVE-R/M 2.300,+.250

SKU: MAN11870-1

Valves

Manley Performance

Manley Race Master Valves 11870-1 VALVE-R/M 2.300,+.250

SKU: MAN11870-1

Valves

IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.

We accept

Description

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.

Part Type

BBC R/M 2.300in Intake Valve

Data: v4.2 - Upd: 2026-10-07 21:31:48

Specifications

Product Attributes - Brand: Manley
Product Attributes - Manufacturer's Part Number: 11870-1
Product Attributes - Part Type: Valves
Product Attributes - Product Line: Manley Race Master Valves
Product Attributes - UPC: 807298054421
Product Attributes - Valve Position: Intake
Product Attributes - Intake Valve Head Diameter (in.): 2.300 in.
Product Attributes - Intake Valve Head Diameter (mm): 58.420mm
Product Attributes - Intake Valve Stem Diameter (in.): 0.341 in.
Product Attributes - Intake Valve Stem Diameter (mm): 8.66mm
Product Attributes - Intake Overall Valve Length (in.): 5.494 in.
Product Attributes - Intake Overall Valve Length (mm): 139.548mm
Product Attributes - Undercut Stem: No
Product Attributes - Swirl-Polished: No
Product Attributes - Valve Tip Length (in.): 0.250 in.
Product Attributes - Valve Tip Length (mm): 6.350mm
Product Attributes - Valve Material: NK-842 stainless steel
Product Attributes - Lock Groove Quantity: 1-groove
Product Attributes - Lock Groove Style: Conventional
Product Attributes - Approximate Weight (g): 137
Product Attributes - Valve Head Style: 5 degree dish
Product Attributes - Valve Seat Width (in.): 0.080 in.
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Underhead/angle radius 10 x .375 in. Margin 0.050 in.

Reference Information

Brand Name/s	Manley Performance
StreetFX SKU	man11870-1
SFX Item ID	4931320
Supplier Item Code	4931320
Manufacturer SKU	11870-1
Manufacturer UPC	807298054421

Compatibility

Application Data

Valve Fitment	Search by engine
Make	CHEVROLET
Beginning Year	1965
Ending Year	1970
Engine Type	V8
Engine Size	6.5L/396
Engine Family	Chevy big block Mark IV
Valve Installed Length	0.250 in. over
Cylinder Head Type	Stock configuration

Valve Fitment	Search by engine
Make	CHEVROLET
Beginning Year	1966
Ending Year	1969
Engine Type	V8
Engine Size	7.0L/427
Engine Family	Chevy big block Mark IV
Valve Installed Length	0.250 in. over
Cylinder Head Type	Stock configuration

Valve Fitment	Search by engine
Make	CHEVROLET
Beginning Year	1970
Ending Year	1972
Engine Type	V8
Engine Size	6.6L/402
Engine Family	Chevy big block Mark IV
Valve Installed Length	0.250 in. over
Cylinder Head Type	Stock configuration

Valve Fitment	Search by engine
Make	CHEVROLET
Beginning Year	1970
Ending Year	1990
Engine Type	V8
Engine Size	7.4L/454
Engine Family	Chevy big block Mark IV
Valve Installed Length	0.250 in. over
Cylinder Head Type	Stock configuration

Valve Fitment	Search by engine
Make	CHEVROLET
Beginning Year	1991
Ending Year	1995
Engine Type	V8
Engine Size	7.4L/454
Engine Family	Chevy big block Gen V
Valve Installed Length	0.250 in. over
Cylinder Head Type	Stock configuration

Valve Fitment	Search by engine
Make	CHEVROLET
Beginning Year	1996
Ending Year	2000
Engine Type	V8
Engine Size	7.4L/454
Engine Family	Chevy big block Gen VI
Valve Installed Length	0.250 in. over
Cylinder Head Type	Stock configuration