The size difference between the YTX30L-BS and the 16 Cell EVO2 is extreme so Ballistic created this simple foam adapter to take up the space in the O.E.M. battery box. This is not meant to be a complete installation kit, but simply a generic adapter. Some modification may be required to install your 16 Cell EVO2 in a powersports vehicle originally equipped with an O.E.M. YTX30L-BS.