the s13 swaps usually go for around $2600 for everything, at least that is what the average price that i have seen. the s14 and s15 swaps go for more. the difference between the red and black top is the year, and i am pretty sure the red tops were out of the s13's, and the black tops are out of the 180sx. i you want more info go to www.heavythrottle.com[/url]