Redesigned mounting structure and geometry — a comprehensive evolution.

Machined from billet aluminum and fitted with a high-precision pillow ball, the Racing Pillow Ball Upper Mount II delivers sharp, direct steering feedback. Eliminating the flex inherent in the OEM rubber bushing mount, it allows the suspension to move with full fidelity — translating directly into enhanced damper performance during cornering.

Compared to the previous version, overall dimensions have been revised, the mounting method has been updated to a body-clamping design to reduce total weight, and a larger-diameter pillow ball provides greater load capacity.

The integrated camber adjustment function allows camber angle to be set between 0° and approximately -2°, enabling precise alignment tuning tailored to your vehicle and circuit requirements.

RRP partnered with a Japanese spring manufacturer known for precision and stringent quality control to develop a bespoke solution: a 4-inch free length spring that combines suppleness and resilience — engineered specifically for the ZC33S. Available in four spring rates from 6k to 12k (in 2k increments), these springs expand the range of rear suspension tuning possibilities, making them an indispensable tool for circuit setup and achieving optimal front-to-rear balance.

A mounting adapter designed to fit straight-wound coil springs to the ZC33S rear suspension.

Compatible with ID65 straight-wound springs, this adjuster works not only with the RRP Racing Rear Spring, but also with a wide range of aftermarket springs from other manufacturers. The threaded collar design allows for fine-tuning of spring preload and ride height, accommodating variations in free length and spring rate.

Please note: Springs are not included. Select a spring appropriate for your intended use, target setup, and damper adjustment range.

RRP High Performance Damper It faithfully follows supple movement like sucking on the traditional road surface, control performance corresponding to change of road surface, ride comfort which can not be thought of as high rate spring.

We repeated a number of tests from the street to the circuit, and we set the setting exclusively for ZC33S.

In the street it is moist and sticky feeling of security and a sense of security that the tires firmly capture the road surface.
In addition to outstanding controllability and traction performance that bring out tire performance at the circuit, please feel the cornering that has a chance to trace the target line according to the steering!