just installed a set of the jba shorties and the passenger side is only around 1/16th from the body and there is rattling going on when under load. i read some old posts from late-05 with a few guys experiencing the same problem but no solutions were posted. any idas - thanks for any help.

 

Welcome to the forums. You do know that the stock headers are shorties, right? Best advice I can give is see if you can send them back and trade up for some l/t's.

If you can't, then try taking it to a pro to take a look. At least get his opinion and that should help you were you need to go. Without seeing your car, I couldn't give guess one what the install problem is but it definitely sounds like one.

 

long tubes arn't legal in CA[:@]. not sure how install could be a problem. its pretty simple to flush bolt headers to the heads and there are not leaks otherwise. i've done them before on old big blocks with lots of room to spare. some other members have had the same reported problem. anyway, taking to to a pro may be the best way forward. one option could be to go with solid motor mounts but i have heard that this does not always correct the problem. i'll figure it out. anyone else had this problem?

 

i have not installed headers on a 06 mustang but while doing some research on then jba reccomends installing aftermarket motor mounts to keep the engine still (not toquring to the side under load) go to mossmustang.com look under jba headers quote "stock motor mounts are sloppy and allow the engine to move up to 1/2 inch, jba reccomends installing after market motor mounts" hope this helps

 

I have JBA shortys with no noise at all..................but I don't race the car either.

 

you can unbolt the motor at the engine mounts ans move the engine slighty away fromt he area it is rubbing. if its to much rubbing the header could be out of spec. I have the ford shorty on my 05 no issues.