car: 2002 grand prix SE with about 120'000 miles on it and a LIM gasket since about 110'00. the larger spectre air intake just slapped onto the end of the MAF, new super duper high end mega ultra bosch iridium plugs and wires (got them for a deal so i figured they couldn't be worse than the stock plugs/wires which would have cost more) and a flowmaster super44 exhaust (again got it for cheaper than the stock exhaust and it needed replacing)....
what i want: little (or big of its not too much $, dont care how many hours of work it would take since i enjoy playing with my car) mods i could do to squeeze out a little extra HP, willing to put endless hours of work but not looking to spend too much money since this car is only going to hold me over for a few more years until i can get me a nice 3800
what could i do? solid wishbone bushings/motor mount? where could i get them from? should i get rid of the stock air boot and put a hard pipe? should i get a difference performance air filter? wrap my crossover pipe? should i pipe the intake into the fender and wrap the intake pipe? where can i get everything i will need for these types of mods? do any of these mods actually improve performance/mileage/reliability?
basically: i want to improve my little engine but not put a heck of a lot of money into it, i just want to be able to enjoy this car until i can afford a nice 3800 super charged or a v8.... all help is appreciated