2015-2017 5.0L Mustang
Phase 1/2 RHD ROUSHcharger Kit
1316-RHD-AA 12152016 7 800.59.ROUSH
INFORMATION ABOUT THE SUPERCHARGER BYPASS OPERATION
There is a great deal of misinformation about the function of supercharger bypass systems. The supercharger
is a positive-displacement pump; that is, so long as it is rotating, it is always pumping air. During low demand
or high vacuum operation (i.e. idle, deceleration, and light throttle cruise), the pumping action is undesirable as
it creates unwanted heat and noise. The bypass circuit, when open, prevents any pressure buildup across the
supercharger and allows air to circulate through the rotors, allowing the supercharger to “idle” freely during these
conditions. This results in reduced noise, and by reducing heat buildup in the intake, signi cantly improves street
and strip performance. As throttle demand increases, the bypass circuit is closed, resulting in full performance
from the supercharger. The bypass circuit is never used to limit or control boost during full-throttle operation and
defeating or altering the bypass function will not result in improved performance in any condition, and will result
in poor drivability.
LIMIT OF LIABILITY STATEMENT
The information contained in this publication was accurate and in effect at the time the publication was approved
for printing and is subject to change without notice or liability. Roush Performance Products reserves the right to
revise the information presented herein or to discontinue the production of parts described at any time.
SAFETY PRECAUTIONS
STOP
STOP
CAREFULLY READ THE IMPORTANT SAFETY PRECAUTIONS and WARNINGS BEFORE PROCEEDING
WITH THE INSTALLATION!
Appropriate disassembly, assembly methods and procedures are essential to ensure the personal safety of
the individual performing the kit installation. Improper installation due to the failure to correctly follow these
instructions could cause personal injury or death. Read each step of the installation manual carefully before
starting the installation.
• Always wear safety glasses for eye protection.
• Place the ignition switch in the OFF position.
• Always apply the parking brake when working on the vehicle.
• Block the front and rear tire surfaces to prevent unexpected vehicle movement.
• Operate the engine only in well-ventilated areas to avoid exposure to carbon monoxide.
• Do not smoke or use ammable items near or around the fuel system.
• Use chemicals and cleaners only in well-ventilated areas.
• Batteries can produce explosive hydrogen gas which can cause personal injury. Do not allow ames, sparks
or ammable sources to come near the battery.
• Keep hands and any other objects away from the radiator fan blades.
• Keep yourself and your clothing away from moving parts when the engine is running.
• Do not wear loose clothing or jewelry that can be caught in rotating or moving parts.
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