Upgrading rear braking with a disc brake conversion can improve braking performance, heat dissipation, and overall stopping power for classic GM and other American muscle trucks and cars. The following five products are well-suited for common rear-end setups and offer a range of installation styles—from bolt-on kits to complete assemblies. This guide highlights key features, compatibility, and considerations to help you choose the right kit for your ride.
| Product | Key Benefit | Amazon Link |
|---|---|---|
| Rear Disc Brake Conversion Kit Drilled Rotor (G Body, S-10, Malibu, etc.) | Wide compatibility with 1978-1988 GM models and related variants | View Product |
| Speedway Motors Bolt-On Rear Disc Brake Conversion Kit | Budget-friendly, complete bolt-on system for GM 10/12 bolt rears | View Product |
| Complete Disc Brake Conversion Kit Single Rear Wheel (Chevy C20/C30, K20/K30, etc.) | Comprehensive package with brackets, rotors, calipers, pads | View Product |
| Inline Tube 1964-77 GM Rear Disc Conversion (Cross Drilled/Slotted) | Long-standing brand for classic GM cars with parking brake | View Product |
| Inline Tube 1970-81 GM F-Body Rear Disc Conversion | Cross drilled and slotted rotors with parking brake | View Product |
Note: Each kit’s compatibility can vary by exact axle width, rotor size, and caliper style. Always verify axle type, wheel compatibility, brake line routing, and parking brake functionality for your vehicle before purchase.
Rear Disc Brake Conversion Kit Drilled Rotor (G Body and More)
This drilled rotor kit is designed as a replacement option for Buick Skylark models from 1978 to 1988, Chevrolet Camaro from 1982 to 1992, and several other GM vehicles from that era. It provides a straightforward path to convert drum-style drums to disc braking for improved heat management and stopping power. The kit is positioned as a practical retrofit for classic cars seeking better rear braking without a full system overhaul. Compatibility includes Buick Skylark, Chevy Camaro, El Camino, Malibu, Monte Carlo, Olds models, and related variants within the late-70s to late-80s window.
Key considerations: verify rotor diameter and mounting pattern for your exact axle and wheel setup; ensure compatible wheel clearance and brake line routing; confirm availability of required hardware for mounting and alignment. This kit emphasizes ease of replacement and restoration-friendly components for classic GM injuries.
Speedway Motors Bolt-On Rear Disc Brake Kit
Speedway Motors offers a cost-conscious bolt-on rear disc brake kit designed for GM 10 and 12 bolt rear axles. The kit includes two bolt-on caliper brackets, two vented rotors, two metric calipers, and the necessary hardware. It is marketed as a complete, easy-install solution that delivers a ready-to-assemble system without extensive custom fabrication. It explicitly notes compatibility with mid-size cars and warns that it is not intended for full-size cars, pickups, or 7.5″ 10-bolt axles, helping buyers avoid mismatches.
Key considerations: confirm your axle type and bolt pattern; check rotor size to fit under existing wheels; consider braking balance and pad material compatibility with your driving style. For budget-minded builders, this kit provides a practical upgrade path with minimal fabrication.
Complete Disc Brake Kit, Chevy C-Series and More
This single rear wheel replacement kit targets multiple Chevy and GM platforms, including C20/C30, K20/K30, C3500, and G20 models from the 1970s to late 1980s. The package lists multiple components: bent brackets, zinc-coated bolts, 12.5″ GM rotors, GM calipers with steel pistons, and semi-metallic brake pads. The design emphasizes a complete, ready-to-install solution for a full rear disc conversion on larger GM trucks and vans, with an emphasis on robust hardware for enduring performance.
Key considerations: assess your truck’s rear axle type, bolt patterns, and rotor compatibility with your wheel wells; ensure parking brake function is maintained; verify availability of all brackets and hardware for a clean, secure installation. This kit is suitable for owners seeking a thorough, one-box solution rather than piecemeal parts.
Inline Tube 1964-77 GM Rear Disc Conversion
Inline Tube’s conversion kit targets 1964-77 GM rear disc upgrades with cross-drilled and slotted rotors and a parking brake-inclusive design. The offering emphasizes stainless steel components and a parking brake wheel kit, distinguishing itself with a focus on classic GM builds where reliability and longevity are priorities. It suits vehicles that require a disc brake system with a traditional parking brake arrangement and a classic-era rotor design.
Key considerations: verify rotor dimensions and parking brake compatibility with your drum-to-disc conversion goals; ensure the kit’s hardware and brackets align with your axle setup; evaluate if stainless steel components align with your environmental exposure and maintenance expectations. Inline Tube emphasizes durable, era-appropriate parts for a restoration-focused upgrade.
Inline Tube 1970-81 GM F-Body Rear Disc Conversion
This Inline Tube kit targets F-Body configurations from 1970 to 1981, with cross drilled and slotted rotors and a parking brake setup. It emphasizes performance-oriented rotor features and a designed-for-fit approach for classic American muscle cars. The kit is positioned for enthusiasts seeking reliable braking performance improvements while maintaining the period-correct look and feel of the F-Body platform.
Key considerations: confirm rotor dimensions and caliper compatibility with your wheels; ensure proper parking brake integration and cable routing; assess how the upgrade affects brake balance and pedal feel in your specific vehicle usage scenario. Inline Tube provides a focused option for late-1970s F-Body enthusiasts upgrading to rear discs.
Buying Guide: Key Purchase Considerations and Comparisons
- Vehicle compatibility: Check axle type (GM 10/12 bolt, 8-lug, 12-bolt, etc.), rotor diameter, and caliper mounting style. Some kits target specific model years or platforms, while others are more universal but still require precise siting and alignment.
- Braking performance: Consider rotor design (vented, cross-drilled, slotted) and pad material. Ventilated rotors typically offer better heat dissipation for frequent braking or heavier loads, while drilled/slotted rotors can improve pad bite and reduce glazing in some conditions.
- Parking brake integration: Evaluate whether the kit includes a functional parking brake or requires additional components. For classic builds, a reliable parking brake is essential for street legality in many areas.
- Hardware and brackets: Complete kits that include brackets, bolts, and hardware save time and reduce the risk of missing pieces. Confirm corrosion resistance and hardware grade for durability.
- Installation complexity: Bolt-on systems are generally easier but may still require alignment and professional brake bleeding. Non-bolt-on variants may demand more fabrication work; plan accordingly for your skill level and tool access.
- Wheel clearance and fitment: Ensure the rotor and caliper dimensions do not rub on wheels, suspension components, or brake lines. Some kits require wheel spacers or adjustments to the backing plate.
- Compliance and safety: After installation, verify that the recalibrated braking balance aligns with the front brakes. A properly balanced system avoids sudden rear lockup and improves overall stopping distance.
- Maintenance considerations: Some kits use stainless or coated components to resist corrosion. Consider the climate and road conditions you drive in when selecting materials.
- resale and compatibility: If you own multiple classic GM vehicles, choose a kit with broad compatibility or opt for kits from brands with a track record of servicing older platforms.
- Budget vs. value: While bolt-on options are budget-friendly, complete kits with robust hardware may offer better long-term reliability, fewer compatibility headaches, and more straightforward installation for frequent use or restoration projects.
Overall, the best choice depends on your vehicle’s exact axle configuration, wheel setup, and how you intend to use the vehicle. For budget-conscious restorations, bolt-on or complete kits that guarantee compatibility with your rear end style offer a balanced mix of performance and ease of installation. For enthusiasts pursuing a long-term, heavy-use classic, investing in a kit with durable rotors, reliable calipers, and solid mounting hardware can yield greater reliability and consistent performance over time.