View Poll Results: Which would sound better dualed out? All cats, 2 cats, 0 cats.
4 cats
2
16.67%
2 cats
4
33.33%
0 cats
6
50.00%
Voters: 12. You may not vote on this poll
4 Catalytic's
Thread Starter
|
Laughing Gas
Joined: Nov 2003
Posts: 794
Likes: 3
4 Catalytic's
Hi all I have a 1997 4x4offroad f150 4.6L, I was under it the other day, and noticed a sickening sight 4 cats 
My truck has 172k miles on it, it had 168 when i bought it this summer. It's awesome it drives like the day it was made, very clean very good condition. When i get er dualed out some time here soon, I plan on having at least the back 2 cats cut off. Only the back 2 beacuse, i would like to keep it legal. but i dont want all that restriction on the engine. And I dont want to put tooo LITTLE back pressure on the engine. I live in South Carolina, and sadly itd be illegal to have them all of anyway.
Questions
1.) Would removing 2 of them reduce the back pressure by to much? Which two I assumed the back two b/c they should be eassier, and there for cheaper to do.
2.) If i removed all cats then put a high performance aftermarket cat, at the back of the H pipe would that supply sufficent back pressure, and does any one know if thatd be legal in South Carolina?
Thanks for your help
My truck has 172k miles on it, it had 168 when i bought it this summer. It's awesome it drives like the day it was made, very clean very good condition. When i get er dualed out some time here soon, I plan on having at least the back 2 cats cut off. Only the back 2 beacuse, i would like to keep it legal. but i dont want all that restriction on the engine. And I dont want to put tooo LITTLE back pressure on the engine. I live in South Carolina, and sadly itd be illegal to have them all of anyway. Questions
1.) Would removing 2 of them reduce the back pressure by to much? Which two I assumed the back two b/c they should be eassier, and there for cheaper to do.
2.) If i removed all cats then put a high performance aftermarket cat, at the back of the H pipe would that supply sufficent back pressure, and does any one know if thatd be legal in South Carolina?
Thanks for your help
Logistics Pro
Joined: Jul 2002
Posts: 4,821
Likes: 19
From: South Dakota
IMO, I would leave them all as they are pretty good flowing cats, and aftermarkets are fairly spendy...from what I've seen.
Your oem muffler is huge as a gas tank and pretty restrictive in my book.
I've heard a 5.4L with out cats and it sounded like a popcorn popper on roids...
Your oem muffler is huge as a gas tank and pretty restrictive in my book.
I've heard a 5.4L with out cats and it sounded like a popcorn popper on roids...
Postmaster
Joined: Aug 2003
Posts: 2,977
Likes: 1
From: South Texas
I wouldn't mess with the cats either. I believe 2 of them are pre-heaters and the other 2 are the actuall cats. I replaced my stock muffler with a Borla and it has a nice rumble. If you want something loud, just cut off the muffler and run straight pipes. Check out the exhaust fourm a little further down for all kind of ideas.
Thread Starter
|
Laughing Gas
Joined: Nov 2003
Posts: 794
Likes: 3
Originally Posted by triton_2002
I wouldn't mess with the cats either. I believe 2 of them are pre-heaters and the other 2 are the actuall cats.
I'm set on FlowMaster 30's I used to have a 99 Ranger w/ 3.0 v6, and i had the 30's on there, and it was beautiful, sounded like a v8 idlein, and even at top rpms, there was no rice to it at all. I jus hope they do even more for the ol 4.6
Yea, i never venture out of the 97-03 f150 forum.
Senior User
Joined: Mar 2003
Posts: 199
Likes: 0
From: baren desert wasteland, s
Ok here goes, I have a 99 f150 5.4l v8 with NO cats and dual 3" exhaust with a magnaflow dual in dual out muffler and gibson headers, sounds awsome, nice rumble to it doesnt sound grunjy at all, I had just the cat back exhaust with headers and it sounded pretty good but was very quite, now its a little louder, not loud like its gona wake up the neighborhood though. If I where you I would go with high flow converters, dont go as big as I did though 3" is too big and I need to take mine down to at least 2.5" my exhaust is way too open and I need to restore some torque
