Exhaust Mod: Keeping the CATs and Cutting the Muffler
#1
Senior Member
Thread Starter
Exhaust Mod: Keeping the CATs and Cutting the Muffler
Hey all,
My first truck (RIP) I got a cat back dual setup from the local O'Rielly's, which cost me over $400. It was a 03 5.4L V8.
My new truck is a 06 5.4L V8. It has twin CATs which join into a Y pipe that goes out to the muffler. When I was installing the dual system on the old truck, after I removed the muffler I started it to see how loud it was. It wasn't any louder than after I had the dual system on.
My question is this, if I chop the muffler off the current truck and just extend the pipe out the back, will that negatively effect the truck at all?
I know that the CATs will create plenty of back pressure, so I am not concerned about that. Would there be any benefit to go from the stock pipe size (I think its 2.5, have not checked yet) to a 3" pipe (from the CATs to the back). My dad is telling me this will make it flow better but he doesn't have any exhaust experience so I am a little suspicious.
Thoughts and suggestions are appreciated! Thanks!
-Nathan
My first truck (RIP) I got a cat back dual setup from the local O'Rielly's, which cost me over $400. It was a 03 5.4L V8.
My new truck is a 06 5.4L V8. It has twin CATs which join into a Y pipe that goes out to the muffler. When I was installing the dual system on the old truck, after I removed the muffler I started it to see how loud it was. It wasn't any louder than after I had the dual system on.
My question is this, if I chop the muffler off the current truck and just extend the pipe out the back, will that negatively effect the truck at all?
I know that the CATs will create plenty of back pressure, so I am not concerned about that. Would there be any benefit to go from the stock pipe size (I think its 2.5, have not checked yet) to a 3" pipe (from the CATs to the back). My dad is telling me this will make it flow better but he doesn't have any exhaust experience so I am a little suspicious.
Thoughts and suggestions are appreciated! Thanks!
-Nathan
#2
Senior Member
Some say it'll create back pressure problems, some say it won't.
You will have no benefit increasing the exhaust pipe to 3" on a stock, normally aspirated 5.4.
You will have no benefit increasing the exhaust pipe to 3" on a stock, normally aspirated 5.4.
#5
Will creat backers sure it's due making a light come on. I installed a one chamber muffler and a code comes on about not enough back pressure. I want to do a 3.5 cat back because it will give it more rumble because my buddy had 3.5 and it gave it a deeper tone and more loud sound.
#6
Senior Member
If it was highly modified and not N/A I would say go for it. But right now it would be a waste of money. Unless you're after more noise.
#7
Senior Member
Thread Starter
Same goes for a single in dual out muffler or true duals. You won't notice any performance differences on your truck. You'll only notice that it's louder.
If it was highly modified and not N/A I would say go for it. But right now it would be a waste of money. Unless you're after more noise.
If it was highly modified and not N/A I would say go for it. But right now it would be a waste of money. Unless you're after more noise.
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#8
Senior Member
Thread Starter
Will creat backers sure it's due making a light come on. I installed a one chamber muffler and a code comes on about not enough back pressure. I want to do a 3.5 cat back because it will give it more rumble because my buddy had 3.5 and it gave it a deeper tone and more loud sound.
#9
Senior Member
#10