I think a good break down of the kit pieces would be nice.
Also I was under the impression the intercooler was around $1200-1500 option. If thats the case than I would rather do stainless steel, and have water injection for the same price or few hundred higher than what your offering. If the I/C is a 1500 value, that would bring the kit down to $3500, than add the W/I for $200 more or so. Just an idea. Maybe offer a grand opening special for the month of November or something instead of a GB. That could save some hassle and bring in business. Whatcha think?