PRL Motorsports 4-Piston Brake Caliper Kit – Honda Civic Si / Acura Integra

PRL.1167.1.GRY

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$1,299.00
$1,299.00
Shipping calculated at checkout.

I have read Axion's store policies on returns, refunds, and cancellations. I also understand that when marked on the product page, special order items may not be canceled for any reason.

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FITS: 

  • 10th Gen Honda Civic Si
  • 11th Gen Honda Civic Si
  • 10th Gen Honda Accord
  • 5th Gen Acura Integra

FITMENT WITH ROTOR MODIFICATION:

  • 9th Gen Honda Civic Si
  • 9th GenHonda Civic EX (282mm)
  • 9th Gen  Honda Civic LX (262mm)
  • 8th Gen Honda Civic Si 
  • 8th Gen Honda Civic EX/LX

Overview:

The design philosophy behind our new 4-Piston Brake Caliper Kit for the 10th and 11th generation Honda Civic centers on intelligent standardization. By utilizing a widely available 312x25mm rotor size—common across various applications including the 10th and 11th Generation civic Si—we ensure not only optimal braking performance but also maximize ease of maintenance and parts accessibility. This approach eliminates the need for proprietary rotors, helping source replacements more quickly and affordably. 

Equally important, the caliper design accommodates the same brake pad profile used in the high-performance FK8 Civic Type R. This strategic decision leverages an existing performance-proven pad format while simplifying logistics for customers. Whether it's for daily driving, spirited weekend use, or track sessions, users benefit from a system engineered with both performance and practicality in mind—delivering OEM-level serviceability without compromise.

The braking system on the Civic Si and Acura Integra was never designed with serious performance driving in mind. The factory single-piston floating caliper gets the job done under light conditions — but once heat builds or pedal pressure increases, it shows its limits fast.

PRL’s 4-Piston Brake Caliper Kit is a purpose-built solution for drivers who demand more. Engineered in-house, this fixed caliper design improves pad contact, pedal feel, thermal stability, and overall stopping confidence — without compromising street drivability.

This bolt-on kit is designed and engineered to work directly with your OEM 312mm rotor and integrates cleanly with the stock hub and knuckle setup. The kit also includes steel braided brake lines, offering you better pedal feel and improved confidence when braking harder at higher speeds. A future larger rotor variant is under consideration, but this initial release focuses on fit, performance, and reliability right out of the box. 

*In order to be compatible with a 355mm rotor variant, installation will require an alternate bracket.

 Quick Specs:

  • Caliper Material and Construction: Forged 6061-T6 aluminum, 2-piece body
  • Piston Design: 44mm primary / 41mm secondary
    • Aluminum 6061-T6 Billet with vented Type 3 hard anodized pistons
  • Bracket Material: CNC-machined 4140 billet steel with electrocoated finish
  • Pad Compatibility: FMSI D1001 (F50 / Type R / STI pad shape)
  • Rotor Fitment: OEM 312mm x 25mm rotor (10th & 11th Gen Civic Si, 2023+ Integra)
  • Weight (per side): Approx. 8.8 lbs with bracket and hardware
  • Finish: Hard anodized caliper body for thermal resistance, corrosion protection, and clean aesthetics
  • Brake Lines: Kit includes a set of stainless steel braided brake lines (required, not optional)

 Direct Vehicle Fitment:

  • 2017–2021 Honda Civic Si (HC10)
  • 2022+ Honda Civic Si (HC11)
  • 2018+ Honda Accord
  • 2023+ Acura Integra (DE4)
  • Many other Honda models when using the 312mm Si rotor

Note: Designed and engineered to work with Honda OEM spec 312mm rotors. Clearance should be verified with included printable template due to dimensional increases over stock.

Fitment Notes:

Compared to the factory floating caliper, the PRL caliper increases outward width by approximately 25mm and vertical height by 30mm on both top and bottom — a total increase of 60mm in overall height. These changes provide greater thermal mass and improved pad contact geometry but may affect clearance on some wheels.

To help with this we are providing a digital PDF template that can be printed out and used to test the fitment and spacing of the brake caliper kit on your wheels. (make sure to print in a 1:1 ratio and use tape measure to ensure printed template matches actual distances)

PDF FITMENT TEMPLATE

 What’s in the Box:

  • (2) PRL 4-Piston Forged Aluminum Calipers
  • (2) Stainless Steel Braided Brake Lines
  • (2) Application-Specific Brackets (CNC-machined steel)
  • Full Hardware Kit: Crush washers, banjo bolts, security pins, pad spring bridges, bolts, bleeder caps

*Rotors and Brake Pads do not come with this kit. For separate rotor/pad fitments outside of OEM, please see our install guide below for verification. 

INSTALL GUIDE

PRL Motorsports 4-Piston Brake Caliper Kit – Honda Civic Si / Acura Integra

$1,299.00

How fast is shipping?

Most orders placed on a weekday before 1pm EST will ship out the same day. Otherwise, it is common for parts to ship in 2-3 days from order date. Please note that both of these exclude special order items, which are clearly marked on product pages.

What is the returns policy?

Most products sold by Axion Industries LLC are covered by our Standard Return Policy and may be returned within 30 days of the original invoice date for a refund. Please note that a restocking fee will apply (see "Refunds Policy" in FAQ).

All returns require written approval from Axion Industries LLC. Original Shipping and return shipping charges are strictly non-refundable. For more information regarding our shipping refund policy, please refer to the "Refunds Policy" on FAQ.

Does it come with a warranty?

Axion Industries LLC does not offer any type of warranty coverage for defective products except those that are manufactured by us. However, the majority of the products available through our website are covered separately under a manufacturer's warranty.

If you recently purchased a product from Axion Industries LLC and are concerned about the fitment or performance of your item, please contact us for assistance.

Our customer service representatives can provide limited support, advice, and assistance identifying the possibility of any manufacturer defects. If we suspect your product does have serious defects, our customer service department can serve as a contact with the manufacturer to help arrange a warranty inspection and, if applicable, any necessary repairs or replacement shipments.

If you wish, you may also contact the manufacturer directly for information regarding product eligibility and specific terms and conditions of warranty coverage.

What happens if I want to cancel?

Unfulfilled, cancelled orders will require a 10%-30% cancellation fee unless you choose store credit (a 5%-15% cancellation fee will apply in this case). This fee is to:

  1. Recover the processing fees for both the order you placed and the order
    you canceled.
  2. Cancellation fees imposed by the manufacturer, should the part be coming
    straight from them. OR
  3. Restocking fees, since the part now has to be resold.

The following may NOT be canceled:

  • Orders that are already fulfilled – the Returns Policy will apply.
  • Pre-orders - the Returns Policy will apply.
  • Special Order items that were approved for sourcing by the customer.
  • Items that are on sale and labeled "final sale" during that sale period.

Please see "Order Cancellation" under FAQ for more.