R2C Track Control Carburetor Spacers
Holley 4150 Track Control Spacers are designed to limit power production and control torque by reducing bore size from 1.75" to 1.25". In Dirt Modified testing, Track Control Spacers provide a power reduction of 50-60 HP with a corresponding reduction in torque on 675-700 HP engines. Track Control Carburetor Spacers are designed to maintain perfect A/F quality and booster signal. The venturi shaped profile also helps control reversion. The phenolic construction provides outstanding strength and helps control carburetor temperatures.