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BMW E30 Front BBK
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  • BMW E30 Front BBK
  • BMW E30 Front BBK
BMW E30 Front BBK

BMW E30 Front BBK

$1,504.96
Caliper Color
Performance pads
Rotor style

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Tech-53 4-Piston Big Brake Kit for BMW E30

Lightweight and more powerful than any other 4-piston caliper kit on the market, this system has been rigorously tested on track with stunning results.

Clamping Force Comparison

  • Stock caliper (floating type): Tech-53 = +61%

  • Competitor 4-piston kits: Tech-53 = +45%

  • Mazda RX-7 FC T2 caliper + adapters: Tech-53 = +36%

We are the only company offering 1.625" diameter pistons, translating into more clamping pressure and balanced front-to-rear bias. No one else delivers this level of street/track performance for the E30 chassis.

Forged Billet Calipers

  • High-strength forged billet body delivers superior stopping power.

  • Four stainless steel pistons ensure balanced pad loading, corrosion resistance, and improved heat management.

  • Fully compatible with a 22mm master cylinder.

Significant Weight Reduction

  • Calipers weigh only 3.9 lbs each — nearly 60–70% lighter than OEM cast iron units.

  • Rotor assembly weighs 3.83 kg vs. 5.45 kg OEM (over 32% reduction).

  • Directional rotors (left and right) for optimized cooling and performance.

11" Two-Piece Lightweight Rotors

  • 32% lower rotary mass compared to OEM E30 rotors.

  • Standard Wilwood 11" rotors, available plain, grooved, or slotted/drilled.

  • Hats are CNC-machined from aircraft-grade 6061-T6 aluminum with a hard black anodized finish.

Benefits of Two-Piece Rotors:

  • Lower mass/inertia → faster braking, less fade.

  • Reduced unsprung rotary mass → less suspension stress and gyroscopic effect.

  • Aluminum hats dissipate heat better than cast iron, protecting wheel bearings.

Fitment

  • Minor trimming of brake backing plate required.

  • 280mm rotors fit most 15" wheels (spacers may be required depending on wheel design).

  • PDF wheel clearance template available – print to scale, cut, and test inside your wheel.

  • Fits all E30 RWD chassis: 318i(s), 320i, 323i, 325i(s).

  • A 22mm master cylinder upgrade may be required for 325ix boosters with M50/S50 swaps.

Complete Bolt-On Solution (all hardware included)

  • 2 × 4-piston Wilwood calipers with fasteners

  • 2 × 11" two-piece lightweight rotors

  • 2 × caliper adapters (bolt onto E30 spindles, 280mm rotor configuration)

  • 2 × DOT-approved custom stainless steel braided hoses (correct length, OE fitment, made in USA)

  • 1 × set of Hawk brake pads