Battery Cable 40in

The ALLSTAR PERFORMANCE Battery Cable 40in is a heavy-duty copper conductor designed for high-current electrical applications in performance vehicles, street rods, and custom automotive builds. Built to handle the demanding power requirements of modified engines, alternators, and auxiliary electrical systems, this 4-gauge cable delivers reliable current flow without voltage drop across longer runs. Whether upgrading a classic car's charging system, powering additional accessories, or installing a secondary battery in a race vehicle, this cable provides the robust construction needed for serious automotive work.

At 4 gauge, this battery cable offers significantly lower resistance than smaller-gauge alternatives, critical when routing power over the 40-inch length without compromising starter crank speed or charging voltage stability. The solid copper construction resists corrosion and maintains excellent conductivity under heat and vibration—common stressors in engine bays. Pre-terminated with 3/8-inch ring terminals on both ends, the cable accepts standard battery post hardware and engine block ground connections, eliminating the need for crimping or soldering during installation. The black insulation jacket protects against abrasion, UV damage, and accidental short circuits while maintaining a clean appearance in custom installations.

This cable is ideal for mechanics and enthusiasts relocating batteries, installing dual-battery setups, extending ground runs to frame-mounted components, or upgrading stock electrical systems in high-output engine swaps. The 40-inch length accommodates mid-engine layouts, rear-mounted batteries, and auxiliary power distribution without requiring multiple splices. The 3/8-inch ring terminals fit M8 and M10 battery posts and ground lugs, making installation straightforward on most vehicles. For anyone serious about electrical reliability in modified or classic cars, this ALLSTAR cable provides the gauge, length, and terminal quality needed for dependable power delivery.