I used IK22 9part no also refered to as 5310, that is how autozone lists it), they were 13 bucks each!!, but i did notice a differance, smoother acceleration, a little more power (to new for me to estimate mileage). NGK also makes one (it's extended reach though), and it's only about 6 or 7 bucks
each. I'm doing some more research on the FPR by JOE P, and see exactly "how" it works and exactly "what" it dose, I'm gonna probabbly need to get that as well. Just installed my autometer mechanical boost guage and seem to top out my boost at 6.5, I'll put the boost controller when I get my car back (with replaced sub and <hopefully> new bushings).
