HPI Nitro Start-Up Set.  Kit contains the essential items needed to start running radio control nitro powered vehicles.

HPI optional super chassis 2.5 for the RS4 Nitro MT2. Will not fit the original MT

HPI Two Threaded Rear Super Shock Set 77-117mm from HPI Racing made for the RS4 MT 2 Kit. Purple.

HPI Nitro MT Truck Sway Bar Set

HPI Optional Graphite Ball Differential for HPI vehicles. This replaces the front or rear differential.

HPI 1200mAh NiMH 6 Volt receiver hump pack.

HPI Optional Graphite Upper Deck Set for the Nitro RS4, RS4 2, Racer, and Nitro Mini Car Kits. This Graphite Set replaces the stock plastic upper deck pieces.

HPI MT2 rear shock tower made of woven graphite. Will not work on the original HPI MT.

HPI optional front universal dogbone for the Nitro RS4 MT. This replaces the center dog-bone.

HPI front MT2 shock tower made of woven graphite.; Will not work on the original HPI MT.

HPI pair of "V"- groove radial truck tires in a high traction PRO compound.

HPI Stock Replacement Shiny CVD Bones for the Nitro MT Racer.

HPI Optional Aluminum Center Pulley for the RS4 Pro 3. This replaces the stock plastic 15T pulley with a stronger pulley.

HPI Optional Steel Heavy Duty Pulley for the Nitro RS4. This replaces the stock plastic 18T pulley.

HPI pair of Geolandar M/T Truck Tires. These tires can be used either on the front or the rear wheels.

HPI optional hinge pin set for the Nitro MT Kit.

HPI set of 4 aluminum replacement springs perch.

HPI quart of power fuel 20% Nitro.  Power fuel for Radio Control model cars.

HPI stock replacement exhaust manifold for the Nitro 3. This part connects the tuned pipe to the crankcase.