Thats a lot i wasnt thinking about putting all my money down on them. How much horsepower/torque gains would i get out of a set up like that and how are the mac headers zstang?

 

I just ordered JBA longtubes last week. Got them yesterday and cant wait to get them installed.

 

you wont get a lot of power out of them, especially for the money. I mainly put them in because of the supercharger, otherwise I would have left the stockers.

But the Macs are holding up very well after 2 years.

 

so can long tubes

 

Melo let me know what you think about the jba when ya get them installed. I have no clue what to get right now. I havent found too much information on anything yet.

 

Indeed you can; in fact I have cats and use rear sensors, too. (...where's my pic of the install....)

 

didnt notice that JBA made long tunes for the 4.0. thought they only made em for the GT.