Did you soak it in PB Blaster? Assuming you did normal bolt prep like that, you're gonna need some heat or a bigger bar. I'd suggest picking up one of those socket sets from Sears with the big teeth (used for rounded off bolts)- because there is a chance they're going to take some considerable force.

 

heres the downpipe just so you know
http://www.zzperformance.com/grand_p...ts1.php?id=635

 

okay so what about the bolts? what are the made of? are they welded to the flange on one side? are we going to have to replace them?

 

Not sure what the bolts are made of- just normal steel that bolts are made from- nothing exotic if that is what you're asking.

I don't know if the bolts are welded or not- just focus on getting the nut off, and you'll find out quick enough. If you put a big enough breaker bar on the nut with one of those special sockets like I said- something is going to give. Either the nut will break loose because the bolt is welded in place (which I doubt) or rusted in place- or the bolt will spin, and you'll just have to hold it with some vise grips.

I can't tell you if you'll have to replace them or not- that depends what they look like when they get off. If you mangle them so much getting them off that you can't get a standard socket on it, then you should replace it. If you've got some new bolts laying around already, you could just cut the nuts off with a dremel or angle grinder.

 

alright we got them off and on the side of the flange towards the engine the bolts are part of the flange, 2 of them are okay but the other 2 are messed up pretty bad. so what should we do?? should we grind the rest of the bolt away and drill through??

 

if he does have the 3400, i know the downpipe from zzp wont work because it is strictly for the 3800 engine, im not sure if it could be modded to work either, your best bet is having him do ubend delete with highflow cat to get the same general result. i think the only place to still sell the 3400 ubend, that i know of at least, is milzy and its pretty expensive.

zzp stopped making it because it didnt give high enough gains to the 3400 from what i hear

 

Sounds like you don't have a choice. You don't want to put mangled stuff back on- you'd kick yourself if it got a leak, or he moved to an area that had emissions and he had to take it apart again. Put new fasteners on it and be done with it.

 

this is for the 3800
http://www.zzperformance.com/grand_p...ts1.php?id=551
and this one is for the 3400
http://www.zzperformance.com/grand_p...ts1.php?id=635
they do make it for the 3400, i actually had to call and they sent me an email with the link, we're still working on the damn thing, its a great fit, one more thing...anyone know why they would send him a K&N sticker with the pipe.

 

Maybe its a mod suggestion? lol- someone goofed up

Oh, and btw- your zzp links don't work- all I get is this:

 

well let me try this again im just gonna put up the one for the 3400, cause im sure you know what the 3800 looks like
http://www.zzperformance.com/grand_p...ts1.php?id=635