i sold my 1997 blazer to my son installed a K&N Cold Air Intake.. and put ALOT of weight with the system thats in my durango now.. and it messed up the transfer case so he is going to replace the transfer case... he is getting a system but nothing big just some MDF wood (2) 15" subs but anyways.. lol.. he is planning on getting a flowmaster exhuast. a super chip, msd, descreem the map and maybe get headers.. but i think that would be good if u dont want to ditch the subs lol