Pro-Line Arrma PowerStroke Front Shocks fit ARRMA 3S and 4S BLX models. These Pro-Line shocks feature 14mm big bore aluminum shock bodies with infinite spring pre-load adjustment, strong machined aluminum shock caps, beefy 3.5mm shock shafts, and true dual-rate springs for a massive performance and durability upgrade over the stock shocks.
For the 3S models, all you need to do is fill the shocks with oil, install, and go! The 4S trucks require slightly longer shocks, so Pro-Line recommends installing the included longer shock ends before use.