Converting drum brakes to discs can dramatically improve stopping power, fade resistance, and overall safety. This guide highlights top drum-to-disc conversion kits that fit a range of classic and mid-year vehicles, helping you select a kit that balances ease of install, compatibility, and performance. Each product below is chosen for its relevance, availability, and reputable brands, with practical notes on fitment and installation.
| Product | Brand | Vehicle Fitment | Notes |
|---|---|---|---|
| Speedway Motors Bolt-On Rear Disc Brake Conversion Kit | Speedway Motors | GM 10 & 12 bolt rear ends (mid-size cars) | Budget-friendly, bolt-on installation |
| Crown Automotive D35DISC-2 Drum to Disc Conversion Kit | Crown Automotive | Various GM drum-to-disc applications | Standard kit for multiple GM models |
| SSBC A120D Drum to Disc Conversion Kit | SSBC | General drum-to-disc upgrades | Stainless steel brakes, trusted warranty |
| Speedway Motors Deluxe 1964-74 GM Front Spindle and Disc Brake Kit | Speedway Motors | 1964-74 GM A/F/X bodies | 11″ discs, comprehensive kit |
| Speedway Motors Deluxe Disc Brake Kit, 1955-1964 Chevy Full-Size | Speedway Motors | 1955-1964 Chevy full-size cars | Bolt-on, improved performance |
Note: All kits are presented for informational purposes. Confirm exact fitment for your exact model year and trim. Always follow manufacturer instructions and consult a professional if unsure about installation safety.
Speedway Motors Bolt-On Rear Disc Brake Conversion Kit
The Speedway Motors Bolt-On Rear Disc Brake Conversion Kit is designed to upgrade GM 10 and 12 bolt rear ends for mid-size cars. It is marketed as an affordable, ready-to-install system that avoids the need for extensive fabrication. The kit includes two bolt-on caliper brackets, two vented rotors, two GM metric calipers, and all necessary hardware. It emphasizes compatibility with mid-size GM platforms while noting it is not suitable for full-size cars, pickups, or 7.5″ 10 bolt axles. This makes it a practical option for enthusiasts focusing on cost-effective rear-end upgrades.
Crown Automotive D35DISC-2 Drum to Disc Conversion Kit
The Crown Automotive D35DISC-2 Drum to Disc Conversion Kit is presented as a dedicated disc brake conversion solution for drum-equipped GM applications. While specific fitment details are not listed in the brief features, Crown Automotive is known for supplying parts tailored to GM vehicles, offering a straightforward path to disc brakes without extensive custom fabrication. Pros include compatibility with a broad range of GM models and a focus on reliable braking upgrades. Users should verify applicability to their particular drum spindle and rear axle configuration.
SSBC A120D Drum to Disc Conversion Kit
The SSBC A120D Drum to Disc Conversion Kit is branded as Stainless Steel Brakes, a recognized industry reference. The kit emphasizes a trusted warranty and strong performance, aligning with expectations for a dependable upgrade. It is positioned as suitable for various drum-to-disc conversions, and users should review compatibility with their specific vehicle’s spindles and mounting patterns. The kit’s durability and brand reputation are common selling points for buyers seeking long-term braking improvements.
Speedway Motors Deluxe Disc Brake Kit, 1955-1964 Chevy Full-Size
The Speedway Motors Deluxe Disc Brake Kit for 1955-1964 Chevy full-size cars is described as a bolt-on upgrade designed to replace stock drum brakes. The kit claims to deliver improved braking performance and includes the key components needed for installation, eliminating the need to source parts separately. It targets classic Chevrolets, enabling a more modern stopping ability while preserving the vehicle’s original layout and spindles. Installation ease and a comprehensive parts package are highlighted benefits.
Speedway Motors Deluxe Front Spindle and Disc Brake Kit
Note: This entry focuses on front-end upgrades rather than a drum-to-disc rear conversion, yet it remains a pertinent companion for overall braking improvement on GM A/F/X bodies. The kit offers 11″ disc brakes, bundled with rotors, calipers, brackets, pads, lines, bearings, seals, and hardware. For builders aiming to upgrade multiple braking systems, this front-disc kit complements rear drum-to-disc conversions and provides a cohesive upgrade path with modern braking feel and reliability.
Buying Guide: Key Purchase Considerations
- Vehicle compatibility: Confirm axle type (GM 10/12 bolt, full-size GM drums, Ford, etc.), year, and spindle compatibility. Some kits specify mid-size GM or A-Body compatibility, while others target full-size Chevys or Ford models.
- Abstraction of installation: Assess whether the kit is bolt-on or requires fabrication. Bolt-on options reduce install time but may still demand precision in alignment and mounting.
- Rotor and caliper specs: Check rotor diameter, venting, and caliper sizing. Larger discs offer stronger braking but may require wheel clearance checks and compatible wheels.
- Hardware and accessories: Look for included hardware (brackets, bolts, lines, hoses) versus needing to source parts separately. Some kits provide a complete, ready-to-install package.
- Brand and warranty: Reputable brands like Speedway Motors, Crown Automotive, and SSBC offer warranties and documented fitment, which can influence long-term reliability and support.
- Rear vs front upgrades: Decide if you are upgrading rear brakes, front brakes, or both. Front discs typically deliver the most noticeable braking improvement, while rear upgrades balance overall performance.
- Cost vs value: Evaluate total cost including installation tools, potential machining, and wheel compatibility. A higher upfront cost may yield better long-term reliability and maintenance.
- Safety and legal considerations: Ensure the upgrade complies with local regulations and aligns with the vehicle’s weight distribution and handling characteristics.
- Warranty and serviceability: Consider the ease of obtaining replacement parts and service from the brand for future maintenance.
These factors help buyers compare kits beyond the headline features, ensuring a choice that matches vehicle needs, driving goals, and maintenance expectations. Always verify fitment with the exact model year and trim, and consult a professional if in doubt about structural or mechanical implications of a drum-to-disc conversion.