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Why My Boots Kept Cracking

OE dust boots are made of EPDM which is fine for most applications but if you track the cars due to the high heat the boots tend to crack.

Some typical example of track cars with cracked/toasted boots

Nissan GTR

Mitsubishi EVO:

Porsche:

Read this legendary review on EvolutionM.net forum (since Oct. 2012) and learn how RacingBrake caliper rebuild components help to improve the braking performance and how durable they are under track heats cycles on Mitsubishi EVO - One of the most popular track cars in those days as Subaru STi.
https://www.evolutionm.net/forums/motor-sports/632485-racingbrake-stainless-brake-pistons-installed-3.html#post10480667

Since we implemented this easy ordering system, not only it provides consumers making right selection quickly and accurately, but also help to avoid confusion from car mfgr and dealer in dealing with OEM#, VIN#, Year, and Model etc.

We don't just make the components to fit like most aftermarket suppliers, we make them better in material and fitment so they perform much better and last a lot longer than OE.

For example before we make the HT dust boots available track enthusiasts were frustrated by the consistent burnt out & cracked boots. Another popular replacement is our one-piece Stainless steel pistons to OE's multiple piece with "purk" which is fragile and crack under high heat. Nowadays about 75% of Porsche customers are buying RB HT boots+Stainless steel pistons, and run their brakes at lower maintenance, less down time, and track their cars with higher confidence.

Since we introduced HT boots in 2012, we haven't had one single complaint of boots failure due to the heat, but only a few incidents reported due to mis-contacting with brake fluid and/or brake grease.