ST Racing Concepts STH100312GM Aluminum Precision in line Steering Knuckle for The HPI Blitz and E-Firestorm - Gun Metal (1 Pair) Note: Our in-line steering knuckles requires you retain the use of the silver spacer on the front axle of your Blitz for proper axle spacing OurSteering Knucklesgreatly improves durability and adds that great factory looks to the front suspension of your HPI Blitz Use aluminum Hop-up parts to increase the strength of any vehicle