07 mustang gt mac lt headers problem help!!!!

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05-27-2009, 07:20 PM

#11

07VenomousGT

1st Gear Member

Thread Starter

Join Date: Mar 2008

Location:

Posts: 80

ok i have my sctx3 flash device how should i program the car once i connect the extentions normaly i put 91 tune on mine do i have to mess with fuel air ratio?
if u have any tips i would gladly appreciated thanks

05-27-2009, 11:07 PM

#12

kpaulhus

4th Gear Member

Join Date: Oct 2006

Location: Jax, FL

Posts: 1,554

Quote:

Originally Posted by Steve O Chap

I don't see how the headers can be too big for the motor, they are designed for the GTs 4.6... are you sure the gas mileage drop isn't due to your right foot and the new found power and sound?

From what I can read in his broken english, he ordered the larger headers. The tubes are a bit bigger and are designed for FI applications. Mine are also the 1 3/4 and I plan on going with the SuperShaker in a year. Ill suffer the MPG loss but o well. I actually got 19 MPG on my last tank. Some weeks is can be as low as 13 MPG