The 3Racing Big Bore Piston 1.1 x 4, model 3RAC-DP09, is engineered to provide consistent valve area and flow characteristics for repeatable shock response. It is suitable for racers seeking a reliable baseline for tuning compression and rebound independently.
Using this piston reduces variability between shock builds and helps drivers converge on optimal oil grade and shim stacks. The consistent internal geometry aids lap-to-lap predictability under varying track conditions.
The piston fits standard big bore damper assemblies and is straightforward to install during pit-side setup. It is an effective part for teams and solo racers looking to extract consistent handling from their chassis.