Intake and Exhaust package for a 2004 3.9L v6 Mustang
It could have been much cheaper, but I had them use all stainless steel. Plus a got some nice black chrome tips, I also got a lifetime warranty from any issues. Total came out to 900 and some change. You could skip the expensive tips and and get some cheaper mufflers and prolly have it done for like 3-500 labor and all.
K&N drop in filter and remove the Silencer (Rubber tube that goes in to the fender) ..and Vola! ..you have a cold air intake! ..and for the record; no the factory airbox system is not restrictive with the Silencer removed.
Or if you have a tuner, you can turn off the rear 02 sensors.
The front 02 sensors are important for the ecu, but the rear 02 are not, the rear 02 only monitors the cats. If you don't turn them off you will have the "Check Engine" light come on, the car will still run fine and all that, but it will through codes about the cats.
by cutting that piece (silencer rubber tube goes in fender) will it throw a check engine light code? Ive never heard of this but i would like to do it also since i have the k&n filter
ok cool i just removed the silencer and I'm waiting for my k&n filter to dry then gonna oil her up and test it out I'm interested too see if there is even the slightest change if so completely worth it since it was free and only took 20 min
And like IllRoush said, you can just take it off, no need to cut it. Just squeeze together where it goes in to the filter housing and it will come right off.
Last edited by MMR; Aug 12, 2012 at 03:34 AM.


