Does anyone know if the 06' RK Custom has the narrow or wideband o2 sensor or any at all.From what I understand if it does it can make it hard or impossible to modify so I would then lean towards an 05'.
The CAT's are in the right side muffler only on the baggers and are very restrictive. Installing V&H slip-on mufflers will increase your performance when compared to stock & cool down your engine.