Simon1

95% probably not. You will need mounts. JBA recommends them.

5POINTOH

Huh....you just confused me...mind you I can get confused easily Do need or do not need??

Diabolical!

Don't bet on it.

5POINTOH

This is referring to the LT's not the shorties.

jdmcbride

The factory motor mounts are crap. Mine were in bad shape after 23,000 miles. Changing them out at the same time you are installing headers is a good idea (and cost effective).

jdmcbride

Exactly... if adding an O/R h-pipe to a factory exhaust adds 8 - 10 rwhp and installing long tubes with an O/R x-pipe adds 17 - 20 rwhp, how much are the long tubes actually adding? 10 rwhp?

So shorty headers with an O/R h-pipe would probably be somewhere in between... 13 - 15 rwhp? And the difference is... ?

Diabolical!

I know: https://mustangforums.com/forum/2005...le-pulley.html

The stock exhaust doesn't really need to be messed with until you get way up in power. It flows exceptionally well for a factory exhaust.

Simon1

Get motor mounts. Read the instructions. JBA recommends them.

5POINTOH

Thanks I will look into this further. How much do the motor mounts run for?

Slug Catcher

Yours came with instructions???

I just got mine. Theres a bag of bolts and a slight indentation in one of the headers?

Is that there for clearence issues, or did I just get some ones "Christmas/scratch and dent" special?