can someone tell me?

***88Racing*** · #1 Sun, April 4th, 2010, 12:18 AM

Quote:

Originally Posted by MacsFX4

right now i have a 2004 f150 fx4 and i have a S&B intake and true duals with X pipe. and i have the gryphon with the custom tunes for my truck but will it hurt anything if i delete the rear cats or cut everything off and put highflows on their.. in other words do i need to get different custom tunes if i do this..

Nope.
No changes required.
Just make sure to get the o2 sensers back in the right locations.

MacsFX4 · #2 Sun, April 4th, 2010, 09:11 PM

ok thanks guys.. i just want to cut the rear cats off or just put high flows on to have a little more sound thats all.. i just didnt want to start doin this stuff and find out it would screw the gryphon all up..

***88Racing*** · #3 Mon, April 5th, 2010, 12:00 AM

Quote:

Originally Posted by MacsFX4

ok thanks guys.. i just want to cut the rear cats off or just put high flows on to have a little more sound thats all.. i just didnt want to start doin this stuff and find out it would screw the gryphon all up..

If you have the 4 cat system now and want to put in the HF cats the cut all cats out and replace with the 2 HF cats. 1 per side.