HPI Nitro 3 Drift enthusiasts will be happy to know that HPI Racing is now offering the Stage-D Hi-Power Rear Exhaust Tuned Pipe Set! What makes this exhaust setup so trick aside from the bling-factor, is the fact that it helps keep your car clean of exhaust fumes that collect debris. Anyone who has spent time drifting with a Nitro engine and traditional side exit exhaust knows this a must have item.