MSD 8739 Two Step Module Selector

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The MSD 8739 Two Step Module Selector is a versatile performance accessory designed for racing and high-performance applications. It allows users to switch between two different rpm or degree modules, providing precise control over engine rev limits during launches and high-speed runs. The module is activated by applying 12 volts to the designated activation wire, making it compatible with a Soft Touch Rev Control or any MSD Timing Control that utilizes plug-in modules. This feature enables a launch rev limiter for optimal acceleration and a high-speed rev limiter for protection at top speeds. Constructed for durability and reliability, the module ensures consistent performance during demanding racing conditions, helping enthusiasts fine-tune their ignition timing and rev limits for maximum performance.

The MSD 8739 Two Step Module Selector is suitable for use with a wide range of vehicles equipped with compatible MSD ignition systems. It is designed to work with various engine setups where precise rpm control is essential, including drag racing, street performance, and track applications. Installation involves connecting the module to the existing ignition system and activating it via the designated wires, making it a straightforward upgrade for performance enthusiasts. The module works seamlessly with MSD’s existing rev control systems, providing an effective solution for launch control and high-speed rev limiting. It is ideal for racers and tuners seeking to optimize engine response and protect components during high-stress conditions.

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Founded in 2010, WheelFlip is a trusted retailer specializing in aftermarket wheels and performance parts.

What began as a modular wheel customization shop has grown into a leading supplier serving both retail customers and OEM partners. Today, WheelFlip is proud to be one of the largest stocking premium JDM wheel retailers in North America.

We offer an extensive selection of top-tier brands including RAYS (Volk Racing, Gram Lights, RAYS Offroad), BBS (including Motorsport), Yokohama Advan, Desmond, Mugen, Spoon, Nismo, and more.

Beyond wheels, we carry a wide range of performance parts—from RECARO seats to Spoon aero components—supporting enthusiasts at every level.

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