RRP RMP Conversion Kit – RRP-01RMP
The Rubrix Mid-Drive Project (RMP)
The highly anticipated RMP Conversion Kit is here—engineered for full compatibility with the stock Yokomo MX4 & MR4BC chassis. This release revives a legendary mid-drive conversion while introducing performance upgrades and refinements designed for today’s racing demands.
 
Developed under the Rubrix Mid-Drive Project (RMP), this kit integrates seamlessly with the RRP RX4 Evo slipper assembly, offering a significant leap in drivetrain efficiency and tuning flexibility. In addition, the conversion maintains backwards compatibility with vintage Yokomo layshafts, preserving heritage functionality while providing a platform for modern electronic setups.
 
Whether you're restoring a classic or optimizing for competition, the RRP-01RMP bridges the gap between past and present—bringing the MX4 & MR4BC into the modern era of RC racing.
 
KIT INCLUDES:
Engraved and Serialized RRP-RMP (3mm Carbon).
Lightweight Motor Mount.
L & R Side Layshaft Mounts.
Top Deck (2.5mm Carbon).
Front Shock Tower (3mm Carbon).
Rear Shock Tower (3mm Carbon).
Dust Cover (1mm Carbon).
Front Bulkhead Brace (3mm Carbon).
Front Camber Brace (3mm Carbon).
Battery Strap (Short & Long 2.5mm Carbon).
2 Belt Sets (Short & Long - 4pcs total).
8 Battery Posts (4 tall & 4 short).
OPTIONAL UPGRADES
Wheel Hub Set Worlds Specs (RRP-002MX): $35 (Discounted Price).
RRP Black CVD Set (RRP-005MX): $60 (Discounted Price).
RRP Gold CVDs (RRP-006MX): $100 (Discounted Price).
Clear ($40) or Painted Body & Wing ($115), (With Trim Service $130).
Rear Sway Bar Assembly
Lunsford style Titanium Turnbuckle Set
This is not a complete car. The RRP RMP Conversion Kit consists of specialized components designed to convert the Yokomo MX4, MR4BC, and MR4BC Special into a mid-drive configuration.
Additional Requirements:
A stock Yokomo MX4 front bulkhead cap is required.
An MR4BC rear differential cover is also needed.
These components are necessary, as they provide the appropriate anchor points for the RMP one-piece top deck.