This list isn’t a must have as the 22 4.0 will give you multiple options within the kit to switch from clay to carpet; these are options I’ve found over the last month as I’ve attended both types of conditions.

Clay:
TLR331019 SERVO MOUNT, CHASSIS BRACE, ALUM - This allows you to move the servo back about 4mm's
TLR334041 HINGE PIN BRACE, LRC +27G - This gives the rear end a little more overall grip

Carpet:
TLR331019 SERVO MOUNT, CHASSIS BRACE, ALUM - This helps by adding front weight and stiffens the front of the car
TLR331028 FORWARD BRASS PLATE SET - This adds more front weight which is needed for carpet
TLR334039 FRONT SWAY BAR SETTLR334040 REAR SWAY BAR SET - This help with the added grip of carpet (less traction rolling)

JR Mitch