Big brake kits look dramatic installed behind usually only front wheels - all plus-sized rotors and burly, multi-piston calipers - but we always sorta wondered how they can rightfully be called BBKs when they're only improving stopping power up front. Aren't there 4 brakes on most cars, after all? EBC Brakes noticed this oversight, too, which is one of the reason's its EBC Apollo Balanced Big Brake Kit stands out, a full-vehicle upgrade supplied complete with matching friction rear pads to fit the original caliper, as well as steel braided brake lines all around and fluid.
The aluminum 4-piston binders in the kit come from EBC Brakes Racing's Apollo Series and are machined for strength from heat-treated low-pressure castings. All Apollo calipers feature a 2-piece bolted design that incorporates high-tensile 12.9-grade steel bolts for reinforcement of the caliper bridge section, and an advanced high-temperature Teflon polyester coating process for durability, which is currently available in Racing Red, Stealth Black, Storm Shadow Blue, and Luminous Yellow.
The 2-piece front rotors are the fully-floating type, which allow the outer ring to expand freely in response to heat. The disc surface sports a swept-groove slot design for dust and gas evacuation and a good initial bite, and to improve cooling the rotor rings feature 48 directional internal curved vanes. For max strength and corrosion resistance, drive bobbins machined from a single piece of stainless steel are employed.
Every kit is supplied with EBC's Bluestuff NDX performance pads for both the front and rear axles, a pad designed for more "spirited" driving, and braided stainless steel brake lines to help mitigate pedal sponginess. Each EBC Apollo Balanced Big Brake Kit additionally comes with a liter of BF307+ super DOT 4 fluid, which has a 307 C boiling point - a significantly higher boiling point than standard DOT 5.1 fluid.
EBC Apollo Balanced BBK are readily available for the E36 (1992-1999) and E46 (2000-2006) generations BMW M3, with more applications to follow. You can get yours from https://ebcbrakes.com/where-to-buy-in-the-usa/where-to-buy-in-the-usa-automotive/ and your local EBC retailer.