had a breaker bar and used 1 can of pb blaster still nothing. we broke the 1/2" adapter right off of the breaker bar. just ripped right through it. i think only air tools will get these off. every bolt on my suby has done this to me. when installed my tbe i broke 2 bolts. when putting the turbo on broke another dp bolt. its seems like someone over tourqed every bolt on my car