StopTech Disc Brake Upgrade Kit
StopTech 928.42539 Select Sport Axle Pack Drilled & Slotted Rear Brake Kit
StopTech Big Brake Kit Technology and Engineering
When enthusiasts and track drivers demand uncompromising stopping power, StopTech has built its reputation on delivering exactly that through precision-engineered disc brake upgrade kits. StopTech was the first to offer balanced brake upgrades for production cars and remains the worldwide leader with over 700 platform offerings that transform factory braking systems into track-ready performance machines.
StopTech's big brake kits feature forged calipers with patented stiffening bridges, patented 2-piece AeroRotors for optimized cooling, braided stainless steel brake lines, performance brake pads, mounting brackets, and all necessary installation hardware. The company's Balanced Brake Upgrade philosophy ensures that each kit is engineered to complement a vehicle's specific weight, master cylinder size, and weight transfer characteristics, maintaining optimal brake bias rather than simply installing larger components.
What Sets StopTech Apart in Brake Upgrade Kits
The performance advantages of StopTech disc brake upgrade kits are rooted in measurable engineering improvements. Larger rotors increase heat capacity, allowing a driver to brake harder stop-after-stop with reduced chance of fade, while the proprietary AeroRotor design features directional vanes that increase airflow to critical rotor surfaces. Their patented Bolt-in bridge calipers are nearly two times stiffer than the leading competition, delivering the consistent pedal feel that drivers need when pushing hard through consecutive corners.
StopTech brakes are proud to be made and developed here in the USA and have a racing pedigree. The California-based manufacturing facility handles everything from milling and machining to final assembly, ensuring quality control at every step. This racing heritage translates directly to street applications, with the company's Racing Division developing full systems tested under extreme conditions before reaching production vehicles.
StopTech Product Lines and Applications
StopTech offers multiple big brake kit configurations to match different performance needs and budgets. The StopTech Touring BBKs are the most affordable Big Brake Kits made in the U.S.A., making serious brake upgrades accessible without compromising on quality or engineering integrity. For more demanding applications, the company's premium kits incorporate larger rotor diameters—ranging from 332mm to 380mm depending on application—paired with multi-piston calipers that deliver exceptional clamping force distribution.
Stoptech's big brake kits have been awarded TÜV approval due to their ease of installation and proper fitment, a distinction that demonstrates the engineering rigor behind every kit design. Each component works as part of a complete system: the performance brake pads are formulated to match the rotor materials, the stainless steel lines reduce system compliance for better pedal response, and the mounting hardware is specified to handle the increased thermal and mechanical loads that come with aggressive braking.
Real-World Performance Benefits
Beyond the technical specifications, StopTech disc brake upgrade kits deliver tangible improvements in how a vehicle stops and handles under heavy braking. The increased thermal capacity means fade resistance during extended track sessions or spirited mountain driving, while the stiffer caliper construction provides consistent brake modulation even as temperatures climb. For street-driven vehicles, the kits maintain civilized manners with low dust formulations and quiet operation, proving that track-level performance doesn't require compromises in daily usability.