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*** As of 6/28/16 we have upgraded this kit to include the newer and stronger DynaPro 4 Piston caliper (olded kits used the Dynalite 4 piston). The front calipers in this kit use the 7812 pad shape. Type "7812" into the search box on the upper left of our site to see all our pad options for this caliper.***
Good-Win Racing has long been the leader in Miata big brake kits, selling far more kits and far more options than any other company. We designed the original FOUR WHEEL Miata Big Brake kit over a decade ago for the track users running lots of additional horsepower and needing additional stopping power. But for years many asked for an even better Miata four wheel big brake kit that included slotted rotors front and rear that were already assembled to the the best aluminum hats available to make installation easier and the entire assembly LIGHTER. Our earlier version 3 kits met these demands but our Version 4 Miata Big Brake Kit goes another step and uses four DBA5000 rotors with Alumalite center hats made from light weight aircraft grade aluminum connected to directional slotted rotors with NAS bolts and lock nuts on 10 connection points between hat and rotor for much higher consistency and reliability and stability over a much longer term of use (our old Version 3 kit was 8 connection points, the lowest cost Wilwood big brake kits are just 6 points of hat to rotor connection).
The version 4 rotors use DBA's patented "Kangaroo Paw" ventilation technology. 'Kangaroo Paw' is a patented hi-tech disc rotor ventilation system, designed and manufactured by Disc Brakes Australia for Good-Win Racing LLC. The Kangaroo Paw design features a series of 144 diamond and tear drop shaped pillars and columns, individually spaced between the rotor faces. This system provides two key advantages. One advantage of this design is the ability to cool the rotor faster than ever before...such that this 11 inch rotor behaves like a 12 inch in terms of thermal capacity and heat rejection rates, yet without the extra weight! The design works on the same principal as an air-impeller, designed to extract hot air. As the disc rotor rotates, aerodynamic turbulence around the individual pillars and columns is generated, increasing the heat rejection rate from internal areas of the rotor. The second advantage is the increased dimensional stability across the disc rotor, directly achieved by the individually spaced pillars and columns. These advantages of better cooling and better surface stability increase the disc rotor efficiency by as much as 20 per cent when compared to conventional 11 inch Miata big brake rotor designs. A 20 per cent increase in disc rotor efficiency, directly translates to reduced brake operating temperatures, brake fade, disc rotor stresses, disc thickness variation, run-out and shudder...and rotor life.
The bottom line is that these rotors usually last our track users three or four times longer than the rotors in our version 1 and 2 kits, and about twice as long as our version 3 rotors (thus, the slightly greater entry cost is paid back several times in rotor replacement savings with many of our track customers reporting YEARS of track use on one set of these rotors.). These DBA5000 custom rotors also feature DBA's Thermal Stability Profiling (TSP) paint markings on the rotor edges which indicate the peak temperature range you reached on track (which helps you fine tune your pad selection). Also, DBA's 10 point connection AlumaLite hats provide the greatest resistance to distortion for uniform disc expansion and added thermal protection for your bearings.
This FOUR wheel Version 4 kit includes: Wilwood Dynalite Forged 4 Piston Billet Aluminum Calipers in front, matching Stainless lines Front and Rear, Wilwood SmartPads (dual purpose pads) for front and Porterfield R4S pads rear, four hats and four rotors (10.75 inch rear, 11 inch front) fully assembled, our T6 aluminum mounting brackets front and rear and all hardware needed. As a no cost option email us if you prefer we ship your kit with Wilwood E compound up front (a track pad with the highest cold coefficient of friction in the wilwood race compounds, an ideal starting track pad for the light weight Miata). This Miata Big Brake Kit has enough thermal capacity for any street Miata, track Miata, autocross or V8 Miata! You will NEVER exceed the thermal capacity of this system. This Miata Big Brake Kit fits all 94-00 Miatas! Also fits 01-02 without the factory sport brakes.
BRIAN'S APPLICATION NOTES: Version 3 with Racing Brake Rotors is great for street and moderate miata track work but the more stabilized and better cooling version 4 rotors will last the track Miata enthusiast much longer, while cooling faster. Common for track customers with this kit to report that the rotors lasted five years or more. ADDITIONAL OPTIONS available with purchase today for this kit include RED calipers.
UPDATE 2012--New "T-Slot" DBA PATTERN is smoother, more quiet and unidirectional (can be swapped left to right). New T-slot pattern shown below, kits ship with four lighter than stock rotor two-piece DBA5000 rotors...the most advanced two-piece rotor on the market. All kit DBA5000 rotors use the same silver finish aluminum hats as before, as shown in pictures below.
Fits most 15 inch wheels...but NOT ALL, does not fit ENKEI RP-F1 15x7