I have a 2001 lightning current mods are C@L Plenum , phenolic spacer , C@L power tube, Accufab sbtb , Moded air box with K@N filter, 4lb lower , E-fan , Excalibrator tuner , NGKTR-6 plugs, Magnaflow high flow cats , magnaflow cat back, I also run a 3 to 1 mixture of Sunoco 94 octane and 100 octane. I will be geting it Dyno tuned in 2-4 weeks.:

 

You'll probably see around 400rwhp/500rwtq with those mods.

 

I would say alittle over 400rwhp... I dynoed 381 with similar mods minus hi flow cat and E-fan