99-04 add 8hp. Why would a 98 get more hp? It feels like more hp because most people get petal to the metal after adding a mod and do not realize the hp they had.
new engine,1.7 rocker arms,Pipes exhaust, shorty cats , shorty headers,under drive and overdrive pulleys,4.2 upper plenum, throttle body spacer, cold air intake, stage one clutch, shorty shifter, and tune. 8.8 in storage