StopTech E82 Big Brake Kit 128i/135i***Extreme Power House

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StopTech E82 Big Brake Kit 128i/135i

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General Benefits of Big Brake Kits
Big Brake Kits give your vehicle that Supercar look and feel, and exceed stock performance in two areas. First, larger rotors increase heat capacity. Second, stiffer calipers and stainless steel lines reduce system compliance.
The key, however, is to increase heat capacity and reduce compliance without upsetting the stock front to rear brake torque ratio. If the brake upgrade you select adds too much front torque (as many do), you reduce your car's ability to utilize the tractive capacity of all of the tires to the maximum practical extent (even on ABS equipped cars) and you therefore create performance sacrifices. In addition, too many pistons or pistons that are too large will make the brake pedal much more difficult to modulate, which limits a driver's control of brake input on the race track.

Advantages of StopTech over other brake upgrades:
Shorter Stopping Distances
Better Brake Modulation
Firmer Brake Pedal
Less Brake Fade
Feature Benefit Summary:
Balanced Brake Upgrades™ with optimum brake bias offer the shortest stopping distance with the best pedal feel
Our patented AeroRotors® with the best airflow available result in better cooling, less fade and longer rotor and pad life
The stiffest aftermarket calipers with patented bridge result in better clamping under hard braking and less pad taper
Track testing of new applications ensures optimum performance
Improved cooling and heat capacity means less fade
StopTech has incorporated several design innovations to improve rotor airflow, cooling and heat capacity. The ability to absorb and dissipate heat is essential to brake system performance.

Benefits of Improved Airflow
Less fade
Longer rotor and pad life
Beter performance
AEROROTOR
The patented AeroRotor features curved vanes with innovations on leading and trailing edges. The uniquely designed vanes inside the disc optimize airflow through the rotor. This improved directional design minimizes turbulence and flows more air than any rotor tested. The result is up to 80% better airflow over original equipment rotors and 10-30% better airflow than directional vaned racing rotors currently available.

AEROHAT
Outer rotor faces run hotter. The patent pending AeroHat™ has directional stand offs between the rotor and mounting bell (hat) that increase airflow to the outside faces of the rotor by 50-100%. Increased airflow reduces the temperature difference between the inside and outside faces of the rotor resulting in less distortion and better performance compared to other fully floating designs. Outer pad wear is reduced. AeroHat™ improves entire brake system airflow by up to 4%.

STIFFER CALIPERS MEAN BETTER PERFORMANCE AND FEEL
Using finite element analysis (FEA) modeling software, we have designed a bolt-in bridge strong enough to stop distortion without sacrificing cooling through the top of the caliper. Distortion is virtually eliminated. The fully forged StopTech ST-40 caliper has the least flex of any tested aftermarket and OE caliper. The air channel in the bridge is designed to help air flow through the retainer, resulting in better cooling.

Benefits of Stiffer Calipers:
Better performance with less vibration, noise and pad taper
Better pedal feel under extreme braking conditions
No radial pad taper
Caliper Deflection
The chart below shows the results of testing 25 leading caliper models by the major caliper companies. Each caliper was subjected to the same pressures and deflection was measured with a dial caliper. StopTech's is the stiffest caliper of the major brands tested.

What’s included?
Calipers
2 piece floating directional AeroRotors with hats (pre-assembled)
Stainless steel brake lines
Caliper mounting brackets
Street performance pads

Rotors
Rotors are available slotted, drilled or plain. Drilled rotors are $100 extra per axle.

StopTech now offers an anti-corrosion gold zinc coating for all AeroRotors. The coating benefits customers who live in cold climates where snow and road salt are commonly encountered, and customers who would prefer to not have visible surface rust on the vanes and outer circumference of their rotors. Zinc coating does not have a negative environmental impact like other coatings. Gold zinc coating costs $70 per axle extra.

Standard Pads
The performance pads included with kits are suitable for both street and light track use such as Autocross (1 lap at a time). For more aggressive track use or race use, it is very important to select pads appropriate to the type of driving.
Other Options
High performance brake fluid - Higher boiling point than stock fluid
Rear slotted or drilled rotors for front kits - Add bite and match the aesthetics of the front kit
Rear stainless steel lines for front kits - Provide quicker pedal response and better feel
Rear performance pads for front kits - Increase maximum operating temperature compared to stock

ST-40 & ST-45 - 4 PISTON CALIPER FOR FRONT & REAR 128i
(4 piston kits with 380mm rotors use ST-45 calipers)
Fully forged aluminum construction
ALL finished parts are 100% leak down and pressure tested to 2500 PSI
ST-40 uses standard FMSI D372 pad
ST-45 uses standard FMSI D609 pad
Any combination of 8 piston sizes available to match kit to vehicle application
Differential piston sizes minimize pad taper
Dust boots are standard
Weight: 7.94 lb (3.6 kg) unloaded
Same caliper used by top Speed® World Challenge and Grand-Am Cup Teams
ST-60 - 6 PISTON CALIPER FOR FRONT 135i


Fully forged aluminum construction
Patented, bolt-in bridge minimizes caliper compliance for a firmer pedal
Stiffest 6 Piston caliper currently on the market
Uses standard FMSI D1247 pad
Can be used on rotors with outer diameter of 328-380mm and thickness of 28-35mm
ALL finished parts are 100% leak down and pressure tested to 2500 PSI
Uses a popular pad shape readily available in over 15 street performance and race friction compounds
Over 19 different piston size combinations available to tune brake torque to the needs of each individual application
Differential piston sizes minimize pad taper for longer pad life and a firmer pedal
Dust boots are standard for reduced maintenance

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