I just got my older brother's bone stock 07 ls. i'm wanting to mod it but don't really know where to start. i'm extremely familiar with mustangs but not too much cobalts. i'm looking at a cat-back exhaust, tune, cai, maf, and possibly cams. also, i want to know what people think about the b&m shift plus. Thanks in advance and i look forward to being part of the cobalt community