With the success of the MBX8R kit, Mugen Seiki is now offering a MBX8R Eco that includes many of the same parts from the MBX8R. The team at Mugen Seiki spent a lot of time testing and developing the MBX8R geometry in race conditions throughout 2021, which lead to many major victories resulting in the MBX8R Eco having many new parts to increase stability, rear traction, improved jumping, and have a wide tuning range. The suspension has seen new suspension mounts and geometry, new longer box-shaped suspension arms and arm stiffeners as well as a new front shock tower and upper front arm mount that uses new pivot inserts for increased tuneability. The MBX8R Eco chassis features a slightly new design to accommodate the new suspension geometry while on top there is a new battery mount for 4S shorty and standard batteries. High Traction Differentials are included in the MBX8R Eco. The Mugen Seiki HTD provides increased acceleration, longer runtime, and more consistent handling. A lightweight high down-force wing allows more air to flow to improve jumping while a revised rear wing mount will provide additional downforce and increase durability. Other final updates include new sway bar collars to reduce sway bar movement, emulsion shock caps, aluminium wing button and updated centre diff cover with holes for lightening.