These sets consist of high temperature/heat resistant, silicone gray dust boots and high temperature pressure seals, designed for StopTech and most late-model Brembo calipers. These are the perfect components for street and track-oriented performance vehicles!
 
These are true, authentic, StopTech replacement dust boots and pressure seals and are recommended for track/racing/high performance driving events.
 
Included are the following components:
28mm (28 mm) High Temp Gray Silicone Dust Boot, Part Number 750.99000, Quantity 4
28mm (28 mm) Pressure Seal, Part Number 753.99000, Quantity 4
32mm (32 mm) High Temp Gray Silicone Dust Boot, Part Number 750.99012, Quantity 4
32mm (32 mm) Pressure Seal, Part Number 753.23411, Quantity 4
38mm (38 mm) High Temp Gray Silicone Dust Boot, Part Number 750.99004, Quantity 4
38mm (38 mm) Pressure Seal, Part Number 753.99004, Quantity 4
7.5 mL StopTech Pressure Seal Lubricant in squeezable dropper bottle (do not use on dust boots!) - This is absolutely the best lubricant to use when assembling rebuilt or new calipers.  Don't use brake fluid, use the proper lubricant instead - included free!
 
This is also StopTech kit part numbers:
143.99028K
143.99032K
143.99038K
 
This seal kit replaces OE Brembo Dust Boot Part numbers:
20.4872.40 (20 4872 40) - 28mm
20.4872.42 (20 4872 42) - 32mm
20.4872.45 (20 4872 45) - 38mm
 
This seal kit replaces OE Brembo Pressure Seal part numbers:
05.5955.52 (55 5955 52) - 28mm
05.5955.54 (55 5955 54) - 32mm
05.5955.57 (55 5955 57) - 38mm
 
Typically on a 6-Piston caliper, there are two of each piston size, so this combination should service two front calipers (12 pistons total).  This kit is assembled specifically for the Porsche 996 and 997 GT3 with iron rotors; however, these may also work on other applications.  This kit will may work for many aftermarket Brembo or StopTech 6-piston caliper combinations.