So, finally got some time to fiddle with the Tanabe Medalion axle back I got on Monday. Jacked up my car, put it on stands and moved onto the bolts...problem is none of the bolts will budge. I sprayed some WD-40 on it hoping that would help, but no dice.

Anyone have any advice dealing with stubborn bolts like this? I read about trying to heat it up, let it soak in some sort of spray solution overnight or something, or use an impact gun. Any other options that don't require me to make any further purchases?