Either, but headers would be preferred. I have manifolds still, and probably will until I get around to my 5.8 build. I tried to put headers on my last truck and broke 2 bolts. Then one pair of BBK headers didn't fit, and another pair of Hedman headers had defects in the welds. I'm of the opinion that if its an original engine with quite a few miles on it, just leave the manifolds in place. If its rebuilt and is a fresh install, then go with headers.

 

My O2 was not in cat, you need to search on Ebay for a similar cat with O2 bung, they have them.
I also did not reuse the AIR tube as I deleted the AIR system. Magnaflow product are great.

 

I'm partial to the Ultra Flo Welded.

One thing that is cool about us.


Performance & Sound Guarantee
We challenge you to try our DynoMax® performance mufflers* risk-free for 90 days - if our products* don't meet the challenge, call us for your money back.

 

So I could buy ur mufflers put them on and if I didn't like the song you would give me my money back?

 

Most mufflers. Our Race Bullet doesn't qualify.
More info and the link with all info.

*Offer limited to the purchase of DynoMax® Stainless Steel Cat-Back Systems and Ultra Flo™ SS Polished, Ultra Flo™ Welded, DynoMax® VT® or Super Turbo™ performance muffler. This offer does not include products which have been modified, improperly applied or installed on vehicles used for commercial or racing purposes. Valid only on vehicles used for private, non-commercial use and may be withdrawn at any time.



Warranty / Guarantee

 

Sounds like a good challenge ^

 

It makes sense, and we want the consumer to be happy. We all know that exhaust tone is subjective. Find the sound you want.
I know I don't want to be stuck with something I wouldn't want.

 

I have a set of 18" long 2.5" race bullets on my 1995 f150 with a 5.8 with no cats and it's perfect! I wish I could put some long tubes on by that will come

 

Might have to try this out... didn't read the warranty yet so it may answer my question when I do but is there a number of how many times I can do this?

 

I have Dynomax Ultra Flo welded on my Mustang and love them. I also have one on the F150, but its pretty mild with the stock cats. That'll change a bit, when I upgrade to a single high flow cat.

 

We want you to be happy. So if it takes a while, we are pretty accommodating. When it happens, it usually just once it seems from what I hear.

I love the UFW on my rigs.