The new HPI Catalog is now available! This catalog is packed with all of the newest cars, trucks and... | HPI BLITZ truck owners can now upgrade to Aluminum Threaded Shocks for the front of their trucks. Th... | HPI Racing has expanded our Silicone Shock Oil choices with the addition of 15, 25, 35 and 45 weight... | HPI Racing has expanded our Silicone Shock Oil choices with the addition of 15, 25, 35 and 45 weight... | HPI Racing has expanded our Silicone Shock Oil choices with the addition of 15, 25, 35 and 45 weight... |