Upgrading axle to catback, worth it?

[VaasL]

After 1 year it has come to my attention that my car was fitted with a roush axle-back instead of a catback by accident….


Is it worth sourcing or making the missing pipes and having these replaced in terms of performance, or is it really not that much of a difference?


I got an EB with lund tune and mishimoto catted downpipe, intercooler and charge pipes.

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[ice445]

Performance wise it doesn't make any difference really. You can do a whole catback for more sound if you want though.

 

[Rael]

I think you'd gain a few horsepower if the cat-back provided a freer flow than the axle-back that was patched on to the OEM pipes. But the gain would too little to justify paying to make the change.

 

[sjmurphy34]

You could get most of the way to the catback by just swapping out the resonator for an x or h pipe. You may gain a little bit of power by doing that, but like others said you probably won't notice it. The exhaust will be a lot louder though especially with the roush mufflers. So if you're going for louder go for it.

edit: just realized this was for and ecoboost. I'm not sure if the resonator setup is the same or not for ecoboosts, so I could be way wrong lol. Also probably won't be an x or h pipe, but rather a Y pipe.

 

[Vicr]

Take it to a muffler shop and remove the section from the downpipe to the resonators and install the same size pipe as the downpipe.

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