Description

Eliminate annoying brake pad knock – drive quietly with confidence!

If you’re running AP Racing Pro 5000 R series calipers and noticing a knocking or rattling noise under braking or over bumps, you’re not alone. This is a common issue caused by brake pad movement inside the caliper. While it’s not a fault, it can be distracting and concerning, especially on road or trackday cars where cabin noise and vibration are more noticeable.

This Pad Anti-Knock Kit is a simple but highly effective solution that greatly reduces brake pad movement. It tightens up the fit between the pads and caliper body, helping to eliminate pad knock and giving you a quieter, more refined braking experience—without affecting performance or pad wear.

Fits the following AP Racing calipers:

• 4-piston: CP9440, CP9441, CP9446, CP9448, CP9449, CP9450 & CP9451 – THESE DO NOT WORK FOR THE CP9444 & CP9445 CALIPERS

One kit includes parts for both calipers.

What’s included:

For CP94XX series:

• Spring clips only (no blocks required)

Installation:
The most efficient method is to remove the brake caliper, install the anti-knock kit, and then refit the brake pads. Installation takes only a few minutes per caliper and delivers a long-term fix for pad movement.

Please note:
This kit is designed to reduce pad knock only. It will not reduce floating disc noise or chatter. If you’re experiencing disc-related noises, feel free to contact me with your disc specifications and I’ll be happy to help—AP Racing parts only.

Also available: brake pad spacer kits for AP Racing calipers to help keep pedal feel through the entire use of the brake pad.

Please see my other listings.