Spoon Sports Sub Frame Rigid Collar kit is simple to install, Rigid Collars ease into position without affecting the basic geometry of the chassis. The OEM bolt holes through the chassis panel and sub frame are too big as they were designed for ease of production in the Honda factory. When production car leaves the Honda factory, everything is new and tight and the chassis hardly moves. After time, the bolts become slightly looser and movement between the panels begins. This is why an older vehicle fitted with new bushings, Shocks and springs, still doesn't feel like a new car. Spoon Rigid Collar is an aluminium washer with a square outside Taper to increase adhesion on the Thinner flange portion in the middle. This fits between the moving panels and with a properly sized bolt is crushed into place when tightened, joining the two panels and stopping movement forever. This is a must for anyone that wants to have that new car feeling again.