I put one on my 97TJ 4.0 and it has been great. I have better throttle response (but I really can't tell until about 3000 rpm.) It works better at higher rpms. I agree that Rusty is a good guy and he sells quality products and this was well worth the investment.(especially when you compare prices with other manufacturers)
Hope this helps
97 Wrangler Sport 4.0L.
3" BDS Lift, 4.11 gears, Tera Disco's, Rusty's Air tube, Rusty's adj. track bars, Class III Hitch, "Generic" Hi-Lift, 33 MT's on 8" black wheels, CB, etc. etc. etc.
03 Toyota Sequioa 4x4: Loaded with all options but basically stock. This is the family hauler.......Miss the WJ but we need more room....