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Vehicle Info NeededALLSTAR PERFORMANCEPART NUMBER: 049-ALL25970
Carb Shear Plate 4150 Carbs
$9999
Ships on 11/03/2026
Lowest Price GuaranteeCarb Shear Plates
- Carb Shear Plate
- 4150 Carbs
- 1-3/4" Bore
Allstar carb shear plates with built-in shear design help maximize performance on race engines with a large amount of cam overlap by creating a dam under the throttle plates, helping to build low pressure while improving vacuum signal to the carb. 1/2" tall plates are machined from 6061-T6 aluminum and clear anodized to protect against corrosion.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
- Spacers isolate carburetor from manifold, preventing horsepower-robbing heat transfer while also increasing air flow due to the increase in distance from the bottom of the carburetor to the manifold plenum. Spacers are precision CNC-machined in the U.S. from a state-of-the-art polymer compound and can withstand temperatures up to 400°F. Available in open or four hole versions for popular 4150 and 4500 Holley style carburetors in 1/2", 1" and 2" thicknesses. Four hole spacers are additionally offered with specially contoured holes which helps increase air velocity under the carburetor.
Part TypeCarburetor Spacer
Product LineAllstar Performance Hi-Flow Carburetor Spacers
BrandALLSTAR PERFORMANCE
Package Height2.3
Package Width7.8
Package Length8.6
Weight1.05 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part NumberALL25970
Package Qty1
Package TypeEA
Some parts are not legal for use in California or other states with similar laws / regulations
