The GPM KG055 front lower arms are precision-engineered components for the THUNDER TIGER K-ROCK MT4, fabricated from high-strength 6061 T6 aluminum to improve chassis rigidity. Multiple positioning holes enable fine adjustment of damper angles to refine handling balance, while delrin collars are supplied to ensure minimal play at mounting points. The hollow profile reduces weight without compromising structural integrity, making these arms a reliable upgrade for hobbyists seeking improved front end response.