Traxxas performance diff lubes make it easy to increase or decrease the limited slip action of the gear differential. Depending on the track conditions, altering the limited slip capability can enhance turning performance for faster exit speeds. Each diff lube weight can be purchased separately as well. Use Traxxas stock and hop-up replacement parts to get the most out of your Traxxas RTR vehicles. This product is made from high quality materials and designed for long-lasting performance. This is replacement hardware for use on Traxxas vehicles; consult your user's manual for exact parts listings.