well, I made 164 whp 144 wtq w/ the crower II's which are more aggressive than the fr III's. I upgraded to a FR head w/ high lift valve springs/retainers, the whole shebang!! also did a 5 angle vavle job w/ 3 mm oversized valves. then of course all boltons!
awesome those are great gains considering most bolt ons with a tune and exhaust only pull between 112-130