Maxima Mx has announced their forthcoming B4 3.5cc off-road nitro engine for 1/8th Scale Racing Car. The B4 Engine is based on the O.S. Speed Power Plants and will be available as low profile heatsink (B4S) or standard heatsink (B4R). Both engines come pre-run and are available for pre-order. By pre-ordering you can add a special back plate with your name engraved.