Aluminum throttle assembly has spring-loaded pad like OEM design. Removable lower arm is splined for versatility in mounting to the right or left of the mounting bracket. Exclusive upper arm is a one-piece design. Matching brake pad is designed with a 1/2"-20 thread and includes a 1/2"-20 stud in kit. Can be mounted centered or off center. Dimmer fits both Chevy and Ford. XL Series aluminum pedals are designed just like our standard billet aluminum pedals, but have an extra large pad for those seeking more comfort and safety.