These sets consist of high temperature/heat resistant, silicone gray dust boots and pressure seals, manufactured by Frenkit Performance for most late-model Brembo calipers. These are the perfect components for street and track-oriented performance vehicles!
 
These are silicon dust boots and high temperature pressure seals and are recommended for track/racing/high performance driving events.
 
Included are the following components:
34mm High Temp Gray Silicone Dust Boot, Quantity 4
34mm Pressure Seal, Quantity 4
Caliper Temperature Sticker - Included free!
 
This is also an OE replacement for StopTech Rebuild Kit part number:
143.99030K - 30mm
143.99034K - 34mm
This seal kit replaces OE Brembo Dust Boot part numbers:
20.4872.43 (20 4872 43) - 34mm
This seal kit replaces OE Brembo Pressure Seal part numbers:
05.5955.55 (05 5955 55) - 34mm
This seal kit replaces OE Brembo Rebuild Kit part numbers:
105.5955.55 (105 5955 55) - 34mm
 
Typically on a 4-Piston caliper, there are two of each piston size, so this combination should service one caliper (4 pistons total).  These are not application specific, rather for those who may have a single torn dust boot or failed pressure seal or for those who are rebuilding their calipers; however, this kit will may work for many aftermarket Brembo or StopTech 4-piston caliper combinations.
 
Common Applications include 991.1/2 GT3/RS, Turbo, and GT4's.