Holley Boost Control/Flex Package

This package adds our rotary boost dial, Mac valve harness, and Flex Fuel together into one convenient PNP kit. The harness plugs into the power tap connector from your Holley harness and requires you to make three connections to the input/output tap on the Holley harness. 

Go from 3 lbs. of boost to 20 lbs. with a simple turn of the knob. Dialing in your requested power level without the need to pack around a laptop. 

Mount the 3 port Mac valve in a location of your choice with the supplied 6-foot lead. Make the output connection and add a custom PWM- output setup in the Holley software to be able to control the duty cycle of the Mac valve. This duty cycle will be a reference to a given boost level on your particular setup.

The 12-position switch can be mounted in the location of your choosing with a 6-foot lead from the Holley harness and make the input connection. From there programming in the Holley can be done with the Holley dongle. This requires knowledge of Holley advanced tables and the input/output features. 

The Flex fuel connector has a 6-foot lead as well. The connector plugs into GM style flex fuel sensors like the ACDelco 13577429.