Cusco MBWT18 Replacement Pillow Ball 18mm ID 33mm OD Coilover Service Component

Vehicle Fitment

• Universal Fitment - Replacement component for Cusco coilovers, upper mounts, and suspension arms using the 18mm ID pillow ball specification

Fitment Notes

• Verify inner diameter (18mm) and outer diameter (33mm) against the original bearing before ordering - not all Cusco upper mounts use this specification
• An alternative MBWT22 (22mm ID) pillow ball is available separately for applications requiring a larger bearing bore
• Commonly used in Cusco Front Pillow Ball Strut Top Mounts (Gravel Rally Spec) for 2008+ Subaru WRX/STI (GR/GV/VA) and other upper mount applications
• Check the Cusco coilover or upper mount reference guide to confirm the correct pillow ball specification for your specific application

Features

• High-precision spherical bearing construction provides zero-compliance suspension movement for consistent alignment and steering feel
• 18mm inner diameter and 33mm outer diameter match Cusco's standard upper mount and coilover pillow ball specification
• Direct drop-in replacement restores original handling performance when existing pillow ball shows wear, play, or noise
• Engineered to Cusco's competition standards - the same bearing specification used in rally and circuit racing upper mount assemblies
• Eliminates the flex and deflection of rubber bushings for more precise, responsive suspension behavior

Specifications

• Inner Diameter (ID): 18mm
• Outer Diameter (OD): 33mm
• Type: Spherical Pillow Ball Bearing
• Application: Coilover upper mount / suspension arm service replacement
• Fitment: Universal (verify application dimensions before ordering)

Included Components

• 1x Cusco Replacement Pillow Ball - 18mm ID / 33mm OD (MBWT18)

Product Description

The Cusco MBWT18 is a replacement spherical pillow ball bearing with an 18mm inner diameter and 33mm outer diameter, designed to service Cusco coilover upper mounts, suspension arms, and other Cusco components that originally use this bearing size. Pillow ball bearings are zero-compliance by design - unlike rubber bushings, they allow suspension components to move freely through their travel without deflection or compliance, which keeps alignment geometry consistent and steering feedback direct.

Over time and mileage, pillow ball bearings can develop play, produce noise, or show corrosion that degrades suspension precision. The MBWT18 is a direct replacement that restores the original performance of the Cusco assembly. It is particularly referenced for use in Cusco's Gravel Rally Spec front pillow ball strut top mounts for the 2008+ Subaru WRX/STI, and is applicable across any Cusco upper mount or arm assembly specifying the 18mm bore. Always verify your application's bearing dimensions against this part before ordering.