Spoon Sports | Rigid Collar Kit | Honda Civic Type R | FL5 2.0T K20C1 | 2023+Inserts into the subframe mounting holes to fill the 2mm gap around the bolts to provide a tighter fit. Prevents subframe from moving and rattling under load. Reduces wobble of the steering wheels with uneven pavement. Sharpens suspension feel and increases chassis rigidity. Rigid Collars are made from a proprietary alloy that has been rigorously tested under endurance racing and street driving conditions. The material has been specially formulated to