High-compression racing engines and high-torque starters demand massive amounts of electrical current to crank over. Standard automotive solenoids often fail in these environments because their internal contact plates aren't thick enough, causing them to "weld" shut or burn out. The Longacre 45900 HD Starter Solenoid is the heavy-duty, racing-grade solution designed to handle the most demanding electrical loads.
This is the standalone, high-performance solenoid used in Longacre’s famous firewall starter kits. It is a "Ford-style" 3-post design that allows for a remote mounting location away from the extreme heat of the exhaust headers—a legendary fix for the "hot start" cranking issues common in GM and aftermarket starters. Whether you are replacing a worn unit or building a custom, high-amperage starting circuit from scratch, this solenoid provides the reliability needed to ensure the car fires up every time you hit the button.
Key Features
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High-Amperage Internal Contacts: Engineered with oversized internal contact plates that can withstand the intense electrical surge of high-compression race engines without sticking or burning.
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Cures "Hot Start" Issues: Designed for remote firewall mounting, which moves the primary cranking relay away from engine heat. This results in a cooler, more efficient electrical path and more reliable starting.
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3-Post Remote Design: Features a standard 3-post configuration (two high-current battery/starter studs and one "S" terminal for the ignition switch), making it easy to wire into almost any custom or racing harness.
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Rugged Steel Housing: Built with a heavy-duty metal casing and high-quality insulators to survive the vibration and harsh conditions of a racing chassis.
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Versatile Universal Fitment: While optimized for racing, this is an excellent upgrade for high-performance street cars, tow vehicles, and off-road rigs that struggle with starter reliability.
