PRL Motorsports Subframe Reinforcement System Collar KitMany drivers may not be aware of the significant slack present in their vehicle's factory subframe, which arises because OEM engineers often need to balance performance with factors like comfort, cost, or ease of assembly. For instance, the subframe mounting holes in the 10th Gen Civic are 2mm larger than the bolts, allowing for shifts, vibrations, and rattles during intense cornering or braking. This can reduce steering sharpness and responsiveness.