EFI tuning and Exhaust Expert
Here is some info on a M8 big bore build we did this week. This is the best stock head M8 engine we have built to date. 2017 Ultra Limited, we installed a Fuel Moto 120 big bore kit w/ Wood WM8-408 cam, Stock heads, SE 64mm TB w/ Ward CNC ported manifold, AIM-SDR clutch, Jackpot 2/1/2 head pipe with Street Outlaw mufflers and tuned it with Dynojet Power Vision. This turned out to be an outstanding combination, broad power that hits early and stays on late. We're now in the 140Hp range with nearly 130Tq @ 2500 RPM with stock heads on the M8 engines, it's all in the details.