Rennline's billet aluminum Throttle Control Ball is the perfect inexpensive interior upgrade for any Porsche equipped with this feature. Factory throttle control balls become faded, cracked, and/or unsightly after years of exposure to UV light. Rennline billet throttle balls are machined from 6061 aluminum and are available in red, silver or black anodized finishes for a durable, long-lasting appearance. Simply tap off your old throttle ball and tap ours on - installation is literally a snap.