Have anyone used the Painless Performance Hi-rpm Lt1 kit ?
If so how did you like it, does it perform the way they say it does ?

 

That would be a really poor idea to use in an already LT1 powered vehicle. The HP numbers are not in any way impressive because you can be sure they are flywheel. I am sure it does perform as they claim just that 365 flywheel is not a good number, MAYBE 310 at the wheels through an auto.