Where do you guys buy that Aero Kroil stuff at? I tried WD-40 when I put on my exhaust, and it didn't loosen crap. When I put on my y-pipe, I used the new formula Liquid Wrench, which worked great, but I still broke one bolt on the cat. I'm needing something that works a little better for when I install my headers this winter.

1999 Mercury Cougar V6 MTX Injen SRI with GMK CAI Extension MSDS Y-Pipe Trubendz Dual-Outlet Borla B&M Shifter