The heart of the 1/8 buggy is the new RWB/FWB adjustable weight chassis design . The innovative system allows the driver to use either configuration with the engine rearward for more traction, or move the center differential and flip the center dogbones to move the engine forward for more steering .
The suspension is revised with new low center of gravity front and rear shock towers and shorter shock absorbers, as well as new 3-hole rear control arms that allow for a softer shock and spring while maintaining support in fast turns. The new wide base rear hubs are available in three fixed axle heights and use 3mm carbon fiber hub towers to allow for several different geometry options. 
The RC8B4.1e buggy was developed to win! Thanks to numerous improvements, it is able to surpass the impressive track record of the RC8B3.1:
- 2018 IFMAR World Championship, Perth, Australia — Davide Ongaro
- 2019 ROAR National Championship, Hutto, Texas — Spencer Rivkin
- 2019 RCGP Series Championship — Davide Ongaro
- 2019 Italian Nitro Championship — Davide Ongaro
- Adjustable weight chassis design to adjust rear grip relative to steering
- Lightweight, low-center-of-gravity aluminum front and rear shock towers
- Front and rear shock bodies 16mm shorter for lower center of gravity and lighter weight
- 6-hole machined 1.4mm front and 1.5mm tapered rear shock pistons included with emulsion shock cap gaskets
- 3-hole rear wishbones with updated rear anti-roll bar geometry for smooth and bumpy trails
- Blue aluminum front wishbone support for increased durability
- RC8B4.1 molded front bumper with profile optimized for bumpy transitions
- 13/44 Ring and Pinion Bevel Gear Set
- 92mm universal driveshaft with 17mm outputs
- Updated Soft Blend triangles for maximum durability in cold weather
- +1 aluminum steering gear for more precise steering in low grip conditions
- Aluminum chassis 7075-T6
- HTC differential.
- Waterproof Radio Case.
- Front pivot ball joints for better steering and reliability.
- 16mm 7075-T6 bigbore shock absorbers with 20mm spring
- Shock absorber axles treated 3.5mm
- Front and rear 7075-T6 aluminum shock absorber support
- CVD front and rear and central 94mm gimbals.
- Carbon upper front plate
- Carbon servo plate
- Quick access to differentials for faster maintenance
- One-piece lightweight aileron support, adjustable
- Aluminum front and rear chocks
- Two-piece engine mount for easy tooth gap adjustment and quick disassembly
- Front and rear anti-roll bars
- Fully on bearings.
- 1/8 scale
- Length 486mm
- Width: 304.5mm
- Wheelbase: Variable
- Radio + receiver
- Steering servo
- Motor & ESC 1/8
- 4 tires + 1/8 buggy rims
- Lexan paint for bodywork
- 4S Li-Po battery & charger
