Hot Racing CDT3100 Aluminum Carburetor Dial Traxxas 3.3 2.5 2.5R

With this Nitro Tuner Dial, you will be able to tell exactly 1/8 or 1/16 of the turn and you can easily set it back to where you started. Now you are able to rich up or lean out your engine an exact amount. CNC Machined from 6061 Aluminum and blue anodized with Laser Engraved Dial fit around the high-speed needles One Nitro Tuner Dial for Traxxas 2.5, 2.5R and 3.3 Nitro Engine with the High-speed needles casing Diameter that is about 7 mm. One clip on Delrin cone collet Installing onto carburetor high-speed needles Cut 1 to 2 mm slot on Delrin collor with scissors . length: 8.95mm Diameter OD 8.5mm ID 6.81