Traxxas 5445 GTR Shock Springs, (6.4 Purple Rate) (pair) Red GTR shock springs (6.4 rate purple) Sold as a pair Use Traxxas stock and hop-up replacement parts to get the most out of you Traxxas RTR vehicles! This product is made from high quality materials, and designed for lasting performance. This is for use on RC vehicles such as the Traxxas Revo, consult your user's manual for exact parts listings.