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I just bought test pipes yesterday.. this and other threads are making me nervous also.. Ill try to take pictures and a "DIY" steps.

 

PB Blaster for a few days... that'll help.

 

impact wrench best tool investment ever!! but yet again i didn't use one for my HFC install; jus pb blast it for a few mins plus tons of elbow grease..if you have a friend whos on roid like the hulk should ask him for the assist

 

my mech installed my berk hfc with LOTS of spray and impact wrench blow torch 2 days ago it all came off perfect and boy was it WORTH the BERK HFC make the stock exhaust sound AMAZING

 

That's good to hear! I'm also putting FI HFCs on stock exhaust. How's the rasp?

 

Ended up trying to break the bolt by over-tightening it... Stripped the bolt some more...

Seems like the only way to remove it now is to cut the top head bolt somehow...

Any suggestions?

 

dremel it otherwise take it to a shop and let them cut it off

 

Lol, the shop where I was getting my HFC's installed stripped the bolt also. The guy said it took him 2 hours to get it out cus it was just spinning around. If you strip the bolt, will there be a problem with putting on an HFC on?

 

Old thread I know but this just happened to me. If I were to cut with a dremel did you cut it from underneath the car anyone

 

Yes, me and my buddy had to do that when I did mine, just be careful not a lot of room to play with. quite difficult to cut the head of the bolt from underneath so just cut the bolt from the bottom. New bolts can be had at any exhaust shop(most HFC and test pipes come with new bolts anyway)

 

Superman g37 thank you so if I can't brake it loose with bolt extracor I can just cut the thread off the bolt right. My pipes do have all new bolta

 

Correct, we cut the thread and it allowed us to remove the rest of the bolt, Make sure you get the metal composite gaskets from z1 motorsports, they create a great seal, you'll never have to worry about leaks

 

Sounds good thank you. Definitely will be getting new gaskets

 

Had the exact same problem...

Used WD40 PB Blaster, 14mm breaker bar, deep socket, shallow socket, air gun, li-on impact wrench, still no luck, heated it with Mapp Gas torch, didnt do the job.

I dont have an oxy-acetalyne torch, and i ended up taking it to Midas who took about 2.5 hours to finish the job, as i got the other 4 bolts off, and left those top two for them, you can't hacksaw them off, since they are bolts and need to stay in place for the HFC install. Don't mess around just a warning, i spent hours trying to get them loose, its a losing battle without an oxy-acetalyne torch!

 

Blow torch ftw! I tried to do it in my backyard with the three extensions and a very long beaker bar. No help. Went to my mechanic and torch all of them off. Was finish within 45 mins. The bottom bolts were already swapped out. Got those off first.