Features:

• Clear Dichromate finish for good looks and corrosion protection
• Calibrated for 480 to 540 Big Block “Crate” motors
• Vacuum secondaries allow use on a wide variety of vehicles. Compensate for all vehicle weights, gearing & transmissions to allow smooth opening of secondary throttle plates
• Quick change vacuum secondary cover allows you to tune for performance or fuel economy
• Billet Metering Blocks for exceptional fuel metering capacity
• 4 corner idle allows you to precisely control your idle system
• Billet Baseplate with Idle-Eze™ allows precision fine tuning of the idle speed resulting in a smoother transition from off-idle
• Large capacity float bowls eliminates fuel starvation
• Large glass float-level sight windows for easy and safe fuel level adjustments
• Dual feed fuel inlets for constant high volume fuel delivery
• “Quik Release” non-stick gaskets for easy jet changes

About Demon

Get classic modular performance when you shop for Demon carburetors at Holley.com. We offer numerous models for countless applications.

• Carburetor Rebuild Kit - Demon 4150

  Every gasket and seal you need to rebuild Demon carburetors with mechanical secondaries

  Part# 190004

  $56.87

  Qty: 

  Add To Cart

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

• 1965 and older U.S. manufactured California Certified vehicles
• 1967 and older U.S. manufactured Federally Certified vehicles
• 1967 and older Foreign manufactured vehicle

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

The following vehicles are considered Emissions Controlled Vehicles:

• 1966 and newer U.S. manufactured California Certified vehicles
• 1968 and newer U.S. manufactured Federally Certified vehicles
• 1968 and newer Foreign manufactured vehicle