Left Rear Bulk Head (Aluminum) for Yokomo YZ-4S - Model S4-002BRLA  [S4-002BRLA]

Left-Side Rear Bulk Head for YZ-4S

Model S4-002BRLA is an aluminium left rear bulk head intended for the Yokomo YZ-4S platform. It replaces the stock left bulk head to give a stiffer rear mount while retaining the original mounting points and layout.

The component is aimed at YZ-4S chassis variants and explicitly lists B-YZ4SF compatibility; confirm the chassis code on your car before installing. CNC-machined aluminium construction provides higher rigidity and better wear properties versus the standard plastic component.

In practice, fitting an aluminium rear bulk head alters how the rear suspension transmits forces into the chassis, typically resulting in a firmer rear response. Choose S4-002BRLA when you need steadier rear traction and a more solid mounting base for medium to high grip tracks.

Designed for racers and tuners, this aluminium left rear bulk head integrates with the YZ-4S chassis layout without changing attachment locations.