BMW 530 Big Brake Kit Upgrade / TTSPORT Classic 8703
This BMW 530's owner wasn't satisfied with how the factory calipers looked or performed, so the car went in for a TTSPORT front six-piston / rear four-piston big brake kit. The goal: fill out the 20-inch wheels and give the pedal more bite for both daily driving and the occasional spirited run.
Stock BMW calipers on a 5 Series are competent but small relative to the wheel opening, and drivers who push the car harder often find the pedal firms up less than they'd like under repeated stops. The fix here wasn't a full track setup — just a proven street-oriented dual-caliper kit sized to the car's 20-inch wheels.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | BMW 530, 20-inch factory wheels |
| Front caliper | TTSPORT TT8703 six-piston caliper |
| Front rotor | 405 x 34mm high-carbon, heat-treated curved-vane rotor |
| Rear caliper | TTSPORT TT6411 four-piston caliper |
| Rear rotor | 380 x 28mm high-carbon, heat-treated curved-vane rotor |
| EPB caliper | TTSPORT electronic parking brake caliper, universal mount |
| Lines / hardware | TT stainless steel brake lines and mounting hardware |
The front-six/rear-four dual-caliper pairing is one of TTSPORT's more established combinations, used across a wide range of street builds. TT8703 up front runs with the 405x34mm rotor, TT6411 out back runs with the 380x28mm rotor, and the EPB caliper keeps the parking brake function intact — a fuller look in the wheel well at a reasonable price point.
Why It Works
- The TT8703 front caliper is built as a fixed six-piston unit with vented pistons for heat dissipation, which helps keep pedal feel consistent through repeated, back-to-back stops instead of going soft.
- Stepping up to a 405x34mm front rotor and 380x28mm rear rotor adds thermal mass and swept area over the stock discs, giving the system more capacity to absorb and shed heat before fade sets in.
- The TTSPORT EPB caliper is designed to bolt on without machining or altering the factory parking-brake bracket, so the rear upgrade doesn't compromise the OEM parking brake mount.
- All of the above clears the car's factory 20-inch wheels as installed, with no spacers needed on this build.
Installation Gallery
What does the TTSPORT big brake kit on this BMW 530 include?
Does the EPB caliper require modifying the factory parking brake mount?
What wheel size does this kit fit behind?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.