Classic Kit

Ball Cups/Studs: Open cups; stock-size studs with material changes allowed

Batteries: 2S hardcase LiPo max; 6-cell Sub-C max

Bearings: Open; bushings may be upgraded to bearings

Bellcranks: Stock geometry, material open

Body/Wing/Wing Mount: Stock or period correct

Camber/Toe/Ride Height: Open

Caster Blocks: Open

Chassis: Stock; no lightening by cutting/drilling; battery and fan mounting mods and hardware upgrades allowed

Drive Axles: Stock

ESC Settings: Non-programmable ESC or mechanical speed controller with reverse removed

Hinge Pins: Stock

Hub Carriers/Inner Mounts: Stock

Motor Limit 2WD: Mabuchi/Johnson 540 27T; Tamiya Torque Tuned (25T); Kyosho G27

Motor Limit 4WD: Mabuchi/Johnson 540; Tamiya Torque Tuned (25T); Kyosho G27

Shock Towers: Stock

Shocks: Stock original diameter; oil free

Slipper: Stock

Springs: Stock diameter; rates open

Transmission: Stock; gear diff oil free

Turnbuckles: Stock size; material changes and threaded rod upgrades allowed

Tyres and Inserts: Free choice but kit size

Wheels: Free choice but kit size

Golden Era

Ball Cups/Studs: Open cups; stock-size studs with material changes allowed

Batteries: 2S hardcase LiPo max; 6-cell Sub-C max

Bearings: Open; bushings may be upgraded to bearings

Bellcranks: Stock geometry, material open

Body/Wing/Wing Mount: Stock or period correct

Camber/Toe/Ride Height: Open

Caster Blocks: Stock

Chassis: Stock; no lightening by cutting/drilling; battery and fan mounting mods and hardware upgrades allowed

Drive Axles: Open

ESC Settings: Blinky, reverse disabled

Hinge Pins: Open material; captured pins allowed in place of E-clips

Hub Carriers/Inner Mounts: Open

Motor Limit 2WD: 21.5T brushless; brushed no limit

Motor Limit 4WD: 17.5T brushless; brushed no limit

Shock Towers: Open

Shocks: Stock original diameter; oil free

Slipper: Open

Springs: Stock diameter; rates open

Transmission: Stock; gear diff oil free

Turnbuckles: Stock size; material changes and threaded rod upgrades allowed

Tyres and Inserts: Open

Wheels: Open

Evolution Era

Ball Cups/Studs: Open cups; stock-size studs with material changes allowed

Batteries: 2S hardcase LiPo max; 6-cell Sub-C max

Bearings: Open; bushings may be upgraded to bearings

Bellcranks: Stock geometry, material open

Body/Wing/Wing Mount: Stock or period correct

Camber/Toe/Ride Height: Open

Caster Blocks: Stock

Chassis: Stock; no lightening by cutting/drilling; battery and fan mounting mods and hardware upgrades allowed

Drive Axles: Open

ESC Settings: Blinky, reverse disabled

Hinge Pins: Open material; captured pins allowed in place of E-clips

Hub Carriers/Inner Mounts: Open

Motor Limit 2WD: 21.5T brushless; brushed no limit

Motor Limit 4WD: 17.5T brushless; brushed no limit

Shock Towers: Open

Shocks: Stock original diameter; oil free

Slipper: Open

Springs: Stock diameter; rates open

Transmission: Stock; gear diff oil free

Turnbuckles: Stock size; material changes and threaded rod upgrades allowed

Tyres and Inserts: Open

Wheels: Open

Modern Retro

Ball Cups/Studs: Open

Batteries: 2S hardcase LiPo max

Bearings: Open

Bellcranks: Open

Body/Wing/Wing Mount: Open

Camber/Toe/Ride Height: Open

Caster Blocks: Open

Chassis: Open, but no additional lightening by cutting/drilling; battery and fan mounting mods and hardware upgrades allowed

Drive Axles: Open

ESC Settings: Blinky, reverse disabled

Hinge Pins: Open material; captured pins allowed in place of E-clips

Hub Carriers/Inner Mounts: Open

Motor Limit 2WD: 13.5T brushless

Motor Limit 4WD: 10.5T brushless

Shock Towers: Open

Shocks: Open, oil free

Slipper: Open

Springs: Open diameter; rates open

Transmission: Open; gear/ball diff swaps permitted

Turnbuckles: Open

Tyres and Inserts: Open

Wheels: Open

Open

Ball Cups/Studs: Open

Batteries: 2S hardcase LiPo max; 6-cell Sub-C max

Bearings: Open

Bellcranks: Open

Body/Wing/Wing Mount: Open

Camber/Toe/Ride Height: Open

Caster Blocks: Open

Chassis: Open, but no additional lightening by cutting/drilling; battery and fan mounting mods and hardware upgrades allowed

Drive Axles: Open

ESC Settings: Blinky, reverse disabled

Hinge Pins: Open material; captured pins allowed in place of E-clips

Hub Carriers/Inner Mounts: Open

Motor Limit 2WD: 13.5T brushless; brushed no limit

Motor Limit 4WD: 10.5T brushless; brushed no limit

Shock Towers: Open

Shocks: Open, big bores permitted, oil free

Slipper: Open

Springs: Open diameter; rates open

Transmission: Open; gear/ball diff swaps permitted

Turnbuckles: Open

Tyres and Inserts: Open

Wheels: Open