Why 17Z / 18Z Big Brake Kits?

Our big brake kits feature fully refurbished 6-piston front and 4-piston rear Brembo calipers, precision-rebuilt and finished to order. Every kit is customizable to your exact spec, from caliper color, rotor size and design, to custom CNC brackets built for your platform.

Originally sourced from high-performance Audi and Porsche SUVs, these Brembos deliver serious stopping power for chassis like the BMW E46, E90, E92, and more, all while maintaining daily drivability and OEM pedal feel.

Get a complete big brake setup at half the cost (or less) of traditional aftermarket kits, without sacrificing quality, fitment, or performance.

Whether you're after aggressive looks, track performance, or both, this kit delivers.

Purchase Here
Refurbished 17Z big brake kit close up

Platform-Specific Fitment. No Guesswork.

From daily street builds to weekend track cars, our 17Z and 18Z big brake kits are tailored to fit a wide range of BMW platforms. While this kit is wildly popular with the E46/E9X platform, we have also made custom kits for Z4s, Non-M's, and many other makes and models.

Looking to outfit a different chassis? We support dozens of platforms — just reach out and we’ll help you spec the right setup.

What's Included in Every Kit

  • Refurbished and Rebuilt Brembo Calipers

    Fully disassembled, rebuilt, and refinished OEM 17Z or 18Z calipers — prepped to perform and look brand new.

  • OEM Pads & Braided Lines

    Genuine Brembo pads for daily or spirited use, paired with stainless steel braided lines for improved pedal feel and response.

  • 2-Piece Rotors & CNC Brackets

    Hub-centric, balanced rotors with custom CNC-machined caliper brackets tailored to your vehicle — ensuring direct bolt-on fitment.

Frequently Asked Questions

What’s the difference between 17Z and 18Z calipers?

Both are 6-piston front calipers originally used on high-performance Audi and Porsche SUVs. The 17Z is slightly smaller and fits more wheels out of the box, while the 18Z offers larger pad surface and rotor compatibility. We’ll help spec the right one based on your wheels and driving needs.

Will this fit my E46 or E9X M3 without modification?

Yes — the kit is built specifically for your chassis. With custom CNC brackets and hub-centric rotors, everything bolts on without any cutting, drilling, or guesswork.

The ONLY modification necessary is trimming the dust shield to accommodate the larger rotor sizes. This is the case for any big brake kit fitted onto these platforms.

Do I need to upgrade my master cylinder or ABS system?

No. Our kits are designed to maintain proper brake balance and pedal feel with OEM master cylinders and ABS systems and stay within optimal brake bias.

What wheel size is required?

You’ll need at least a 18" wheel for 17Z calipers and 19" wheel for 18Z setups. All stock M3 wheel faces should clear the caliper, but we recommend doing research if you are running aftermarket wheels with custom offsets.

Can I customize the kit?

Absolutely. All our kits are made to order with customizability in mind. You can choose the caliper color, rotor size, and rotor design by reaching out to us via our contact page after you placed your order.

What’s the current lead time for kits?

Our current estimated lead time is 8–10 weeks. Each kit is built to order, and timing can vary depending on parts availability, customization requests, or overall order volume. We’ll always keep you updated throughout the process, and we appreciate your patience while we build it right.

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17Z/18Z Big Brake Conversion Kit - E46 & E9X M3

$2,300.00 USD
$2,300.00 USD
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Looking For An Alternative Big Brake Kit Setup For Your Car?

In addition to our custom 17Z/18Z kits, we also offer full-spec Brembo GT big brake kits for a wide range of makes and models, from European sports sedans to JDM platforms and beyond.

These kits are fully customizable and built with premium components, just like our 17Z and 18Z kits

Whether you're after maximum track performance or a complete aesthetic package, we’ll spec the right setup for your build.

Purchase Brembo GT Kit Here

Still Have Questions? Let’s Talk.

Not sure which kit is right for your setup? Need help verifying fitment or customizing your order?

We’re here to help. Whether you’re looking to spec a full kit, inquire about Brembo GT setups, or confirm wheel clearance, we’ve got you covered.