This class is simple. Traxxas modified cars only https://traxxas.com/products/models/electric/slash-modified.

You can change any fluid and run any receiver or transponder.

Tires permitted:

* Stock Traxxas Tires  

* Grooved G6T SC Oval Tire / D40 Compound / With Inserts

* JConcepts Swiper LP 2.2 Oval Tires

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​Everything else stays stock.

Battery max 5200mah 50C lipo.