I would do the tuner first, or do it all at one time, if you are looking for power I would go with a Vararam they give the most power out there. If you would like forum pricing on anything let me know I would be more than happy to get you the best deals available. If you have a 4x2 BBK's will be fine, if you have a 4x4 BBK's won't fit and you will need to go with JBA's or ARH longtubes.