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Kit shock setup. Part numbers link to AMain.
Out of the box the Viper 990 Evo runs 900 cst front, 900 cst rear (Serpent oil), on 2 hole (#160134) front, 2 hole (#160134) rear pistons. That is the kit setup; you will need to adjust it for your track conditions. The RC Setup App can help dial it in.
The kit springs are 21mm 7.5/42.6 Silver (#160311) front, 4.9/28 Pink (#160324) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
Free to start · iOS & Android
Your Serpent Viper 990 Evo is in the RC Setup App
Save every setup change you make to your Serpent Viper 990 Evo, get AI tuning answers for that exact car, and log your races — at the track or back in the pits.

