03 6.0 Cats removal

[bigboy21]

I just bought a 03 6.0 F-350 a couple weeks ago. Haven't done anything but tinted it. I'm thinking about taking the cats off and leaving stock muffler. I heard that will make the turbo whistle better. Any suggestions or comments?

[PGreenSVT]

4 or 5 inch straight pipe or stay on the porch.

[MPTonyT]

just deleting the Cat does not make much diff at all in sound. Now a straight pipe.....

[travisH3]

Yeah. With the muffler still on you won't notice a difference really. Take the muff off and leave the cat and you get a little rumble and no whistle. Take cat and muff off and you got urself a jet fighter with a good rumble. Oh and you got the ridiculously loud turbo.

[jobsi]

I took my cat off and left the muffler and it actually got quieter but the turbo did whistle a little louder . I am going for the 5" next

[nick49001]

i have a 03 6.0 and if u like the jet whistle sound deff ditch the cat and the muffler it sounds awesome

[WildStyle]

^^^^^

I second that!

Love my 03 with stock piping with muff and cat delete pipes.

[bigboy21]

Ok guys I dropped the muffler and left the cat. Whistles better and rumbles little better. So if i drop the cat now its gonna scream? I heard it's a huge fine in SC if you get caught without the cat. Whats my chances of getting caught??? Insight please!

[nick49001]

so just take the cat off knock the guts out of it and bolt it back up thats what i did to mine free cat delete in my opinion and has stock apperance

[Galaxie]

Turbo backs without mufflers or a cat are cheap. Make the move!