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Rear Big Brake Kit - Stage I - Cross Drilled & Slotted Rotors (306x22) - (NO LONGER AVAILABLE)

Upgrade your stopping power with larger two-piece rotors
10X Entries For Our 25th Anniversary Sweepstakes!

ECS
Mfg Part #
B5S4S1RBBK-XS
ECS Part #
ES#3653
Brand
ECS
Note:This product is no longer available.
Note: This product is no longer available.

Product Details

10X Entries For Our 25th Anniversary Sweepstakes!

This Stage 1 rear big brake upgrade kit is the perfect complement to the ECS Tuning BBK on the front axle of your vehicle. Not only will it look just like the front behind your open wheels, it will provide extra braking power and balance your brake bias. A low price and an easy installation make it a real show stopper.

The stock calipers are used in conjunction with ECS Tuning's own caliper bracket. This spaces the caliper out to meet the larger, 12.1" (306x22mm) ECS 2-piece rotors. The improved clamping leverage increases brake torque. Drilling and slotting evacuates heat and pad off-gassing to keep thermal gain low and pads tight against the rotor.

Includes everything you need to upgrade your braking, including caliper carrier brackets, rotors, ECS' Exact-Fit brake lines and all associated hardware.

ECS also prepared a thorough, step-by-step installation guide to walk you through the installation process. Check it out under the Product Info section of this product page.

*This kit does not include a brake pad set so you can decide which pads best suit your needs.

 

*** ECS does not recommend disassembling the two piece rotors***

 

This part does not have vehicle applications yet. For fitment verification, contact our sales team via 330-331-2003, Live Chat Text Us! , or [email protected].

Kit Contents

Description Brand Qty Lifetime
Super DOT4 Brake Fluid - 1 Liter Pentosin - Corporate Logo 1 NO
Hex Bolt, 6x1.0x10 - (NO LONGER AVAILABLE) ECS - Corporate Logo 2 YES
ECS Stainless Steel Brake Line ECS - Corporate Logo 1 YES
2pc Cross Drilled & Slotted Brake Rotor - Left (306x22) ECS - Corporate Logo 1 YES
2pc Cross Drilled & Slotted Brake Rotor - Right (306x22) ECS - Corporate Logo 1 YES
Rear Caliper Adapter ECS - Corporate Logo 2 YES
Caliper Carrier Bolt - Priced Each ECS - Corporate Logo 4 YES
Medium Strength Threadlocker Blue - 1.5ml - (NO LONGER AVAILABLE) American Grease Stick - Corporate Logo 1 YES

Some kit components are covered by our Lifetime Replacement Program

Products protected by our Lifetime Replacement Program are covered for as long as you own the product, no need to worry about an expiration date. Purchase your products and enjoy some worry-free motoring, knowing we've got you covered.

If you have any questions, would like to learn more or are ready to place a replacement claim, click here!

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Return and Exchanges

Need to set up a return? Click here to begin: Return Process

All you need is your order number and email address.


New/Unused Product Returns

ECS Tuning will accept returns for unused products within 90 days of the ship date for a refund to the original payment method used. The customer is responsible for the return shipping costs and fees. If selecting to use a prepaid shipping label, the shipping cost will be deducted from the total refunded amount. All new/unused products must be new, unused and must be in the original packaging, including labeling, manuals, hardware, etc. Special order parts are non-refundable.

In the event that we find an error on our website or on behalf of an ECS Tuning Representative, we will provide a return shipping label from the original delivery location.

Refused Packages

Any domestic orders that are returned to ECS Tuning as refused by receiver or non-deliverable will be subject to a return handling fee and will be processed as a return in compliance with our standard return policy, including a 15% restocking fee.

Any international orders that are refused at the time of delivery will be subject to carrier abandonment of the package, at which time the ordered products would be discarded by the carrier. The customer will not be refunded for the value of the order and the discarded products are no longer retrievable.

Return Process

Return Process

ECS Tuning now offers an online returns solution! To get started, simply log into your ECS Tuning account, Click the "View Orders" button on the My Account home page and select the order that you wish to make a return on to begin. If you have any questions, feel free to reach out to our Customer Service Team for assistance!

Please note: Refunds will be processed to the original payment method used on the order or to an in store credit, respective to the type of return that is made as well as any pre-existing arrangements with an ECS Tuning Customer Service Representative. In the event that multiple forms of payment were used, we will refund the value to an in store credit. In the event that a return label is provided, these charges may be deducted from the total refund you receive.

Original shipping costs are non-refundable and the buyer is responsible for return shipping charges. ECS Tuning will not accept COD deliveries.


All in store credit balances will expire after one year from the original purchase date.

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Shipping Policy

Free Shipping On Orders $49 & Up

Items marked with a 'Free Shipping On Orders $49 and Up' logo may qualify for free standard economy ground shipping to the contiguous United States (48 states) for most orders with a value greater or equal to $49.00 USD. Oversized products and direct ship products are excluded from this offer unless otherwise noted.

Free Shipping

Items marked as 'Free Shipping' may qualify for free standard economy ground shipping to the contiguous United States (48 states). Oversized products and direct ship products are excluded from this offer unless otherwise noted.


The policies listed above are subject to change at any time without notice.

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Lifetime Replacement

Want to know more about our Lifetime Replacement program?

Click here to learn more.

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Why You Should Shop From ECS Tuning

ECS Tuning stands out as more than an automotive parts supplier-it's a vibrant community fueled by a shared passion for cars. Born from the enthusiasm of car lovers, we offer an unmatched understanding and commitment to the automotive world, providing high-quality parts and accessories sourced from our own experiences. Our selection is meticulously crafted to meet the highest standards of performance, quality, and design, catering to both the latest trends and classic styles.


Our distinct advantage lies in our passionate team and comprehensive support, offering expert advice and seamless service from selection to installation. Shopping with ECS brings exclusive perks, including our Lifetime Replacement Guarantee and free shipping on orders over $49, enhancing the value of every purchase. As a central hub for car enthusiasts, ECS Tuning fosters a rich community where ideas and experiences flourish, transforming us from a mere supplier into a platform where automotive dreams come to life.

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Cancellation Policy

At ECS Tuning, we understand that plans can change. That's why we offer a flexible cancellation policy for our customers. You may cancel your order at any time before you receive the shipment confirmation. This policy is designed to provide you with peace of mind and the flexibility to make adjustments to your purchases as needed. Should you decide to cancel your order, simply reach out to our customer service team, and we will assist you with the process swiftly and efficiently.

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ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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