See Details

25% Off Online Orders of Select Hard Parts. Enter Promo Code MMJ30 in Cart.

Close (X)

25% Off Select Parts and Accessories
Receive 25% Off Your Online or In-Store Purchase. Use promotional code MMJ25 at checkout to receive discount. Not valid in combination with any other discounts, promotions or items already on sale. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Those products that are included will be displayed in product search results and product detail pages. INCLUDES the following categories: Starters, Alternators, Fuel Pumps, Radiators, Shocks & Struts, Chassis, CV Axles, Batteries, Ignition, Window Motors, Wipers, Appearance Chemicals, Car Wash Accessories, Floor Mats, Lift Equipment, Hand Tools, Headlamps and Bulbs. Excludes the following brands: Powerstop, Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, Thule, Thule Karrite, JVC, Flowmaster, Hurst, B&M, MSD, Moog, Wagner and BBK Performance. Valid online until 2:59 am EST on 5/1/17.

Free Shipping on Orders Over $50 or in-store pickup
https://www.pepboys.com/customer_care/policies/shipping

69_302_8739
Zoom
×
Zoom [+]
  • Part #: 8739|
  • SKU: 9955718

Not Available

Pay in Store Available

    • Allows a launch rev limiter and a high speed rev limiter
    • Must use RPM modules to set limits, sold separately
Retail
$80.99
PayPal available for online purchases. Major credit cards accepted online and in store. Pay online, in-store or take advantage of our Pep Boys credit card. Learn more and see additional details in cart.

MSD Module Selector, Two Step

The MSD Module Selectors allow you to choose two or three different rpm limits that can be activated at different times. With this ability, the possibilities are endless. As an example, we'll use a drag car with a Three Step Module Selector plugged into the rpm socket of a 7AL-2 Ignition. The different rpm modules are activated when 12 volts are applied to a corresponding wire. By connecting one wire to the line-lock circuit, one module will be activated during the burnout. This helps keep tire temperatures consistent. When the line-lock button is released, the limit turns off. When you're on the starting line, you can activate the second limit through the clutch or trans switch. This provides a steady and consistent rpm for firm holeshots every time. When no modules are selected, the remaining high limit is active to protect the engine in the event of driveline failure. The Two Step works the same, but only with two different limits.The Module Selectors can also be used with an MSD Timing Control. By plugging the Selector into a retard module socket, you can activate different retard amounts at select times. This is a great feature for engines being upgraded to a multi-stage nitrous system. With the addition of an RPM Activated Switch, you can use the Two Step to activate a shift light at different rpm.The Module Selectors must be used with an MSD Soft Touch Rev Control or a Timing Controller with a high-speed retard module. No rpm or retard modules are supplied.
  • Allows a launch rev limiter and a high speed rev limiter
  • Must use RPM modules to set limits, sold separately
  • Note these module selectors must be used with an MSD soft touch rev control or a timing controller with a high-speed retard module


Works Soft touch Rev Controls
Yes
Includes Launch Rev Limiter
Yes
Quantity
1
Adjustable RPM
Yes Modules sold separately
Color/Finish
Black and Silver
Module Selector Material
Plastic
Adjustable RPM
Yes Modules sold separately
RPM Module Control Range
Varies depending on the modules sold separately
Includes Burn Out Rev Limiter
No
Includes Overrev Protection
Yes

9955718