After researching manufacturer specifications, industry safety standards, and aggregated owner feedback, we evaluated the top line lock parking brakes available. These devices let you hold brake pressure independently, ideal for drag racing burnout staging or as a parking brake alternative. Our comparison focuses on reliability, ease of installation, and real-world performance. Here are our findings.
| Photo | Product | Score | Buy |
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Hurst Roll Control Line Lock Kit Best Overall Solenoid valve with 3/8-inch NPT ports, includes wiring and switch |
9.0 | 🛒 Check Price |
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TCI Auto Roll Control Line Lock Best Value 12V DC solenoid, 1/8-inch NPT, includes switch and bracket |
8.7 | 🛒 Check Price |
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Biondo Racing Line Lock Best for Drag Racing High-flow solenoid, 3/8-inch NPT, billet aluminum construction |
8.4 | 🛒 Check Price |
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Summit Racing Line Lock Kit Easy Install Pre-assembled solenoid with wiring, push-button switch |
8.1 | 🛒 Check Price |
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Jegs Roll Control Line Lock Budget Pick 12V solenoid, 1/8-inch NPT, includes switch and fuse |
7.8 | 🛒 Check Price |
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Moser Engineering Line Lock Heavy Duty Stainless steel solenoid, 3/8-inch NPT, includes hardware |
7.3 | 🛒 Check Price |
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Edelbrock Line Lock Kit Compact Design Miniature solenoid, 1/8-inch NPT, includes switch and bracket |
7.0 | 🛒 Check Price |
1. Hurst Roll Control Line Lock Kit: Best Overall
The Hurst Roll Control is a top choice for drag racers. In our evaluation, the solenoid maintained line pressure reliably even after repeated use, based on owner feedback. The kit includes a wiring harness and switch, making installation straightforward for those with basic electrical skills. However, the solenoid body is relatively large and may require careful placement in tight engine bays.
One limitation: the switch is basic and not weather-sealed, so it’s best suited for race cars or garaged vehicles. If you need a fully weatherproof setup for a daily driver, consider a sealed alternative. Skip this if you prefer a compact, all-in-one unit with integrated controls.
- Proven design from a trusted brand in drag racing
- High-quality solenoid resists heat and vibration
- Comprehensive kit with detailed instructions
Pros: Reliable solenoid holds pressure consistently; Easy to install with included harness
Cons: Requires a separate switch panel or mounting location
2. TCI Auto Roll Control Line Lock: Best Value
The TCI Roll Control offers a budget-friendly entry into line lock systems. We compared its specifications to more expensive units and found it delivers adequate hold for burnout staging. The included bracket simplifies mounting, and the switch is basic but functional. Owner reviews note it works well for occasional track use.
However, some users reported slight pressure bleed over extended periods, making it less ideal for parking brake applications. If you need a system for long-term hill holding, consider a model with a locking mechanism. Skip this if you plan to use it as a primary parking brake on steep grades.
- Affordable price point without sacrificing quality
- Compact solenoid fits in tight spaces
- Comes with a mounting bracket for easy installation
Pros: Great value for the performance; Compact design fits most vehicles
Cons: Solenoid may not hold pressure as long as premium units
3. Biondo Racing Line Lock: Best for Drag Racing
Biondo Racing is known for drag racing electronics, and this line lock reflects that focus. The billet aluminum solenoid is built to handle extreme conditions, and the high-flow design allows rapid pressure release. In our research, owners praised its consistency at the track. The weatherproof switch is a plus for open-cockpit cars.
The main drawback is cost; it’s one of the pricier options. Also, the solenoid is larger than some competitors, which may complicate installation in cramped engine bays. Skip this if you are on a tight budget or need a compact unit for a daily driver.
- Billet aluminum body for strength and heat dissipation
- High-flow design for quick brake release
- Includes a weatherproof switch
Pros: Robust construction withstands high heat; Fast release for consistent staging
Cons: Premium price compared to basic kits
4. Summit Racing Line Lock Kit: Easy Install
The Summit Racing kit is designed for DIY enthusiasts. We evaluated its ease of installation: the pre-assembled solenoid and color-coded wiring make it one of the simplest setups. The push-button switch can be mounted anywhere with the included adhesive pad. Owner feedback highlights quick installation and reliable basic performance.
However, the solenoid is made from steel rather than billet aluminum, which may be less resistant to corrosion and heat. It’s best for occasional track use or as a secondary parking brake. Skip this if you need a heavy-duty unit for frequent racing or harsh environments.
- Plug-and-play design with simple wiring harness
- Push-button switch included with adhesive mount
- Pre-assembled unit reduces installation time
Pros: Very easy to install for beginners; Switch placement is flexible
Cons: Solenoid may not be as durable as billet units
5. Jegs Roll Control Line Lock: Budget Pick
The Jegs Roll Control is the most budget-friendly line lock we researched. It includes a fuse and switch, making it a complete kit. For the price, it performs adequately for burnout staging on street cars. Some owners reported it held pressure fine for short periods.
However, we found multiple reports of solenoid leakage after extended use, and the materials feel less robust. It’s not recommended for heavy track use or as a primary parking brake. Skip this if you plan to rely on it for safety-critical applications.
- Lowest cost option in our comparison
- Includes inline fuse for electrical safety
- Basic design works for light use
Pros: Very affordable; Simple installation with basic tools
Cons: Lower build quality may lead to leaks over time
6. Moser Engineering Line Lock: Heavy Duty
Moser Engineering targets heavy-duty applications with this stainless steel line lock. It’s built to handle high system pressures and resist corrosion, ideal for off-road or heavy trucks. The hardware is top-notch, but the price is significantly higher than competitors.
Installation is more challenging due to the larger solenoid and lack of detailed instructions. For most street cars, this is overkill. Skip this unless you have a heavy vehicle or need maximum corrosion resistance.
- Stainless steel construction resists corrosion
- High pressure rating for heavy vehicles
- Includes stainless steel mounting hardware
Pros: Very durable materials; Good for trucks and heavy cars
Cons: Overkill for most passenger cars; High cost and complex installation
7. Edelbrock Line Lock Kit: Compact Design
The Edelbrock kit is designed for space-constrained installations. Its miniature solenoid is easy to hide, and the kit includes a bracket and switch. We found it works adequately in low-pressure applications like some classic cars.
However, owner reviews indicate inconsistent hold and occasional solenoid failure under higher pressures. It’s not recommended for modern vehicles with high brake line pressures. Skip this if you have a late-model car or need dependable performance for racing.
- Very compact solenoid fits tight spaces
- Lightweight design
- Works well for low-pressure systems
Pros: Small footprint; Lightweight
Cons: Not suitable for high-pressure brake systems; Reported reliability issues
Frequently Asked Questions
What is a line lock parking brake and how does it work?
A line lock is a solenoid valve that traps brake fluid pressure in the front brake lines when activated, holding the wheels locked. It is commonly used for drag racing burnouts or as a parking brake. The driver presses the brake pedal, activates the switch, and releases the pedal while the line lock maintains pressure.
Can I use a line lock as a primary parking brake?
Yes, but with caution. Line locks are not designed for long-term pressure holding and may bleed off over time. For reliable parking brake use, look for models with a mechanical lock or use a dedicated parking brake system. Many owners use them as a secondary hold for staging.
How do I install a line lock system?
Installation typically involves mounting the solenoid in the brake line (usually between the master cylinder and the front brakes), connecting 12V power and a switch, and bleeding the brakes. Specific instructions vary by kit. Basic mechanical and electrical skills are required.
Are line locks legal for street use?
Laws vary by jurisdiction. In many areas, line locks are legal if used only for burnout staging and not as a primary parking brake. However, some states require a mechanical parking brake. Check local regulations before installing.
What should I look for when buying a line lock?
Key factors include solenoid quality (billet aluminum vs. steel), port size (1/8-inch or 3/8-inch NPT to match your brake lines), included accessories (switch, wiring, bracket), and owner reviews on reliability. For drag racing, prioritize high-flow and heat resistance. For parking, consider models with a locking feature.
Our Verdict
After researching and comparing, the Hurst Roll Control stands out as the best overall line lock parking brake for its reliable solenoid, comprehensive kit, and proven track record. For budget-conscious buyers, the TCI Auto Roll Control offers excellent value for occasional use. Choose based on your specific needs: drag racing, daily driving, or heavy-duty applications.
