waited ages in the UK......

[UKCHRYSLER300]

for this diablo predator,finally got it,did everything possible,checked out kr's with mike,np.but i need more bottom end from say 30-40mph to 80mph after that speed i'm not bothered(cos i wanna keep my licence)i'm beating everything that tries in the UK,but I wanna beat them BIG STYLE,any ideas on the tune,im running 93 tune,I'm running stock,dont really want to run cai and exhaust cos im a street sleeper kinda guy(sneeky feka)oh and I want my motor to last a loooong time,thanks boys