Mac's wont seal
 

I just installed my mac axel back and these things wont seal worth a damn:(Does any one have this problem? I hate to have to weld them[:@]

RE: Mac's wont seal
 

i hope i don't have that problem...mine are in the mail coming to me!

RE: Mac's wont seal
 

see? all the people saying MAC is crap have our reasons....

RE: Mac's wont seal
 

Call them I am sure they will replace them.
Not sure how that could happen....what kind of gap are we talking about here?

RE: Mac's wont seal
 

Ok heres the deal.

MAC mufflers are NICE. High quality mufflers, and sound great!
BUT.....
Their clamps SUCK!


The best thing you can do is go get a set of 2-1/2 U-clamps from your local muffler shop (under $10 for a set). Replace the MAC clamps with these, HOWEVER do not over tighten them, they will crimp the mufflers onto the over axle pipes if you get them too tight and you will have trouble removing the mufflers if you ever need to.

They look similar to this.
http://www.bikecare.co.uk/trail_gator/u-clamp.jpg


Josh

RE: Mac's wont seal
 

The ford racing axle backs are hard to get a good seal. I had to reposition the clamps several times. If all else fails you could try some exhaust tape around the pipe before putting the mufflers on, that should help it seal, but not sure how long it will last.

RE: Mac's wont seal
 

What jcovercash said, bar none they will do the job, the MAC clamps are dainty little things meant for dainty little mufflers, which the MAC's are not. Doesn't make sense it's like to departments decided on them and the idiots won.

RE: Mac's wont seal
 

The MAC's aren't crap, the mufflers rock, it's the clamps that suck... I also haven't been seeing the MAC's are crap threads...

RE: Mac's wont seal
 

look in the 5.0 section....

RE: Mac's wont seal
 

I had a problem with my ford racing axel backs, the clamps were of a good quality but I think they were just a hair too big. I cranked them down to a bit over 35ft-lbs but they are still loose enough that a good tug could pull them out.
-howy