2.7 Exhaust Questions

[Wesmertz]

I am looking to do a CAT delete and 2.5" straight pipe on my 2024 HD. Where can I find a down pipe to connect the exhaust to the turbo?

Also, I don't see any sensors on the exhaust anywhere, so I am initially thinking I can mod the exhaust without throwing any codes. Has anybody done this?

 

[reedcharlie75]

I am looking to do a CAT delete and 2.5" straight pipe on my 2024 HD. Where can I find a down pipe to connect the exhaust to the turbo?

Also, I don't see any sensors on the exhaust anywhere, so I am initially thinking I can mod the exhaust without throwing any codes. Has anybody done this?

They made them for the 2.5L, and they work great, but I haven’t seen any for the 2.7L, I’d like one for that too

 

[SteveinUT]

Maybe see if one of the guys on here has an old cat laying around their garage. If it fits between the turbo and mid-pipe, you should be good with one of the High Flo delete pipes made for the '18 and up Roxors. Unless there is some change in turbo between the 2.5 and 2.7? There are no sensors on the exhaust on my '18, and I doubt there is on a '24 as well.

 

[SPX]

I am looking to do a CAT delete and 2.5" straight pipe on my 2024 HD. Where can I find a down pipe to connect the exhaust to the turbo?

Also, I don't see any sensors on the exhaust anywhere, so I am initially thinking I can mod the exhaust without throwing any codes. Has anybody done this?

I have done this on my 2024 and cut the flanges of the factory SCR and put on 2.5 exhaust no muffler. I also made block of plates for the EGR but kept it intact and plugged in. At the EGR tube itself, we welded it internally and system is intact, No SCR, No flow through the EGR and No Codes.

 

[BAM]

I have done this on my 2024 and cut the flanges of the factory SCR and put on 2.5 exhaust no muffler. I also made block of plates for the EGR but kept it intact and plugged in. At the EGR tube itself, we welded it internally and system is intact, No SCR, No flow through the EGR and No Codes.

Do you happen to have any photos of what you did? Thanks!

 

[SPX]

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• Modifications And Customizations 2.7 EGR Help

I do not have pictures of the internal weld, didn't take any, when you take the tube off you will see what you need to weld.

 

[Mt. Jim]

I took off both the exhaust tube to the egr and the intake tube and put blockoff plates on intake and exhaust manifolds. The egr and cooler are still there but no longer do anything . Now starts better at higher altitude and has a little more power in higher gears. also no bog when I take off. Neaxt is to build exhaust from turbo with 2 1/2 pipe.

 

[DrunkenSlug]

I took my Cat off my 2025. I cut a rectangle, yanked the filter honeycomb out, welded it back. I took the egr tube section off, cut the tube then welded it closed. Homemade block plates.

No codes, no worries.

 

[njeff]

I took my 2023 to a muffler shop along with the cat/muffler removed for them to use as a guide for a straight down pipe...I used the rest of the original piping, $120. I am happy.

 

[kcrepairgarage]

I purchased my downpipe from HighFlo Performance and used stock exhaust. Works well even with the 2.7 tune. Exhaust gas temps are not an issue.