MustangForums.com - View Single Post - 94-98 VS 99-04 Header guide!

i_drive_stangs · 06-15-2007, 02:12 AM

ok so i have learned that the collectors on my 98 are 2.25". does that mean that the first set of cats are 2.25" in/out or not? and are the first set of cats consiterd "pre cats" or are they? also if i got the magnaflow cats would i need all four to be legal. all four meaning the first set of cats then the magnaflow cats or could i just use one magnaflow cat on each tube and be legal?

thanks sean.

06-15-2007, 02:12 AM	#28
i_drive_stangs 3rd Gear Member Join Date: Jul 2006 Location: Posts: 609	RE: Once and For All 94-98 VS 99-04 Header guide! STICKY!!! ok so i have learned that the collectors on my 98 are 2.25". does that mean that the first set of cats are 2.25" in/out or not? and are the first set of cats consiterd "pre cats" or are they? also if i got the magnaflow cats would i need all four to be legal. all four meaning the first set of cats then the magnaflow cats or could i just use one magnaflow cat on each tube and be legal? thanks sean.