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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 was 8 connection points, the lowest cost Wilwood 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. This 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 force of hot-air out from within the 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 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.
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 nearly double the life of even the version 3 kit rotors (thus, the 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 custom rotors also feature DBA's Thermal Stability Profiling (TSP). A bonus feature is Thermo-Graphic paint markings (see above picture)that indicate the peak temperature range you reached on track (which helps you fine tune your pad selection). Also, DBA's 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 Smart pads for front and Porterfield R4S pads rear, four aluminum 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. Enough thermal capacity for any street Miata, track Miata, autocross and V8 Miatas! You will NEVER exceed the thermal capacity of this system. This Miata Big Brake Kit fits all 90-93 Miatas!
NOT ALL ROTOR CAST IRON IS THE SAME! After decades of design and development with race teams around the world Disc Brakes Australia developed a proprietary cast iron ( XG-150 ) for use in it s premium performance disc brake rotors. This specially formulated iron is rich in carbon and alloyed to produce superior thermal characteristics and longevity that cheaper rotors cannot match.
BRIAN'S APPLICATION NOTES: Version 3 is a great product...but the more stabilized and better cooling version 4 rotors will last the typical track enthusiast years longer. OPTIONS available with purchase today with this four wheel kit include RED calipers , and our SIX PISTON DP6 CALIPERS
UPDATE 2012--New "T-Slot" DBA PATTERN is smoother, more quiet and unidirectional (can be swapped left to right). All kit DBA5000 rotors use the same silver finish aluminum hats as before, as shown in pictures below.
Clears most 15 inch wheels but NOT ALL 15 inch wheels, does NOT clear our helium or Enkei RP-F1 wheels. IF in doubt about wheel clearance, email us for the template.