A line lock is an electric solenoid valve installed in your vehicle's front brake circuit. Activated from the driver’s seat, it traps hydraulic pressure in the front calipers even after you release the brake pedal, leaving the rear wheels free to spin. This makes it essential for consistent, controlled burnouts at the drag strip, and it’s also a handy hill-holding aid for manual-transmission cars.

When choosing a line lock, focus on real-world reliability and ease of install. A quality kit starts with a solenoid rated for continuous duty, built from corrosion-resistant materials like brass or stainless steel, and sealed against moisture and debris. Look for complete wiring with a weatherproof switch, and pre-terminated harnesses that simplify hookup. The kit should include the correct adapters for your brake line thread and diameter — most domestic and import systems use 3/16″ or 1/4″ inverted flare or metric bubble flare fittings, but always verify before ordering.

• Continuous-duty solenoids handle prolonged activation without overheating
• Brass or stainless construction resists corrosion and provides long service life
• Weatherpack or sealed electrical connectors keep moisture out of the circuit
• Complete kits include solenoid, mounting bracket, illuminated switch, fuses, and line adapters
• Universal design fits most cars and trucks with standard hydraulic brake systems

Our collection brings together proven line lock kits from the brands racers trust. Whether you’re building a dedicated strip car or just want reliable burnout control on test-and-tune nights, you’ll find a kit that matches your brake system and your budget.