5.3 Style Y-Pipe on a 6.0?

[Dan Acosta]

I am learning a lot today about exhausts. Has anybody switched from a dual-pipe 6.0 exhaust to a 5.3 Y - pipe style exhaust?

 

[S33k3r]

I am learning a lot today about exhausts. Has anybody switched from a dual-pipe 6.0 exhaust to a 5.3 Y - pipe style exhaust?

Why would you? What are you trying to gain?

 

[Dan Acosta]

Well, I think I have a bad cat. The exhaust system on my truck is a 2 into one muffler style. One of the cats is part of the muffler, and that is the bad one. I cannot find a replacement for this muffler/cat combo anywhere, so I was considering just swapping out the whole system to the 5.3 style exhaust. Other options are to try and just replace 1 cat (cut and weld in), or gut the cats and tune for it.

 

[Tonyrodz]

Well, I think I have a bad cat. The exhaust system on my truck is a 2 into one muffler style. One of the cats is part of the muffler, and that is the bad one. I cannot find a replacement for this muffler/cat combo anywhere, so I was considering just swapping out the whole system to the 5.3 style exhaust. Other options are to try and just replace 1 cat (cut and weld in), or gut the cats and tune for it.

If it was me I'd just replace the bad cat--cut and replace.

 

[Dan Acosta]

This is what I am working with. Its a California 4 cat set-up. I will be taking it in for an estimate on two hi flow cats and maybe the muffler.

 

[drakon543]

rockauto might have what your after. the image you linked shows the right side cat all the way back by the muffler. the right side rockauto lists is farther forward. the walker brand right side specifically states carb compliance when i pull it up.

 

[Dan Acosta]

There seems to be a lot of options - as far as upgrades or replacements for the single inlet style. There are hardly any for the dual inlet style. I thought it might be more common since (I believe) all the 6.0s have the dual inlet style.

 

[iamdub]

Aftermarket cats are known to not be sufficient or long-lived and OEM cats are super pricey. If it were me, I'd have the cats replaced with straight pipe and a custom tune that includes deleting out the rear O2s. You'd still be hundreds ahead and a failed cat will never be an issue. You can have fake cats welded in if you have to pass a visual inspection.

 

[drakon543]

Aftermarket cats are known to not be sufficient or long-lived and OEM cats are super pricey. If it were me, I'd have the cats replaced with straight pipe and a custom tune that includes deleting out the rear O2s. You'd still be hundreds ahead and a failed cat will never be an issue. You can have fake cats welded in if you have to pass a visual inspection.

seemed like he might be in ca i think they are pretty picky out there

 

[Dan Acosta]

I have the truck in Florida, but previous owner had it shipped from CA.

However, I took it to a muffler shop just to see what they might suggest, and the manager seemed to think it wasn't an issue if there were no codes. So much so that he really didnt even want to quote me (I respect that he wasnt trying to take my money), but eventually he said Magna-pro hi flow cats would be 240 each.