Have an 06 F350 and am thinking of deleting the cat. Two questions:

How much does it help lower (if any) EGTs if I keep the stock exhaust system?

Will it make the truck louder? I ask that because my 05 had a cat delete and it was noticeably louder at both idle and acceleration than my 06 and my wife's 04 Excursion. I kinda like the smooth quiet ride 😎

Thanks for the input

 

I wouldn't bother buying a cat delete pipe. Just go with a full turbo back kit.

 

I was just going to get the muffler shop to cut out the cat and replace it with a piece of pipe. $60 bucks to do it

 

The factory down pipe and exhaust is going to be restrictive as well. You can find a full turbo back for 300 or so.

 

I pulled mine out and used a drill bit to drill it out then used a rod to beat the rest of it out. My delete was free. slightly louder. I have no idea egt as I dont have a gauge but my cat as blocked so it ran much better.

 

You can get a cat delete pipe for about that same price.

Sean

 

I wouldn't think there'd be any difference between an 05 and an 06 as far as sound goes. Unless of 'course your '05 had an AM muffler too...

 

Nope. Stock muffler on the 05.

 

Of course I still have mine, but if I had it deleted it would not be noticebly louder and would only be around $40.

 

Any effect on EGTs??

 

I couldn't give you any firm numbers but I do remember when I deleted the cat with the rest of the stock exhaust in place the temps dropped a little.

 

When you say a little, is that like 20-30 degrees or like 100 degrees?

 

I've been debating between gutting the cat in my truck or just getting a cat delete pipe. With the delete pipe, I would have to swap it back and forth each year for emissions, but at the same time, I realize the OEM cat is around $2800 from Ford and if I end up moving to California, they only allow OEM cats. My fear if I gut the cat is failing emissions if I move to Cali. It would, however, make emissions in just about every other state more convenient.

I would also like to know the EGT difference after deleting just the cat.

 

Um........Why would anyone in their right mind move to California?

 

strictly for work and no other reason. If I did move back there, it would not be by choice lol