Manual brake conversion plate for all G body GM vehicles - Compatible with Monte Carlo, Regal, Cutlass, Grand Prix, Malibu, Grand National, etc CNC Machined 1/4 Inch Thick 6061 Aluminum for warp free performance Includes stainless mounting hardware Made in the USA - So you know the quality is as good as it gets! Allows usage of several other manual brake master cylinders to eliminate bulky, heavy, unsightly brake booster. Better feel, especially on big cam cars with little vacuum generation. Thick FULL 1/4" 6061 aluminum construction will not flex and strengthens thin firewall, resulting in more accurate pedal control. Powder coated in your choice of colors for long term good looks. INCLUDES 18-8 stainless hardware! As usual, made with quality here in house at Massive in the USA! Compatible with 73 Chevelle master, 78-80 malibu. Several other master cylinders, some S10 and Chrysler may work as well.