3in DP + 2.5in catback questions

[ckenda1]

So I ordered a MF Competition Series catback (got a really good deal from Lethal Performance) for my EB and am thinking of pairing it with a cp-e High Flow Cat DP (http://cp-e.com/webstore/product/ford-mustang-ecoboost-qkspl-downpipe-with-high-flow-cat/).

Are there any concerns or issues I should be aware of going from a 3in DP to a 2.5in catback?

I'll be happy to post vids in a couple weeks when it is done.

Thanks!

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[Juben]

That's what all of the current systems on the market are, except for the Borla kits (2.25"), so there shouldn't be any problems. The MBRP kit that's getting ready to be released is the only full 3" kit that I've seen.

Btw, if you go to CP-e's vendor section, there's a discount code for like 5% off. I don't remember it off the top of my head.

Ninja edit: the code is MUSTANG6G. Lol

 

[ckenda1]

Thanks Juben! I went by cp-e yesterday as it is only about 10 minutes from work. Nice folks and seem to have some good stuff coming out soon. They have a DP with install special going right now for a really good price; too good to pass up really.

 

[Juben]

I'm running their downpipe too. I've been extremely pleased with it.

 

[jbailer]

That looks nice and would be very convenient for me in MD. The thing that would worry me is the statement at the bottom of the page, "While this may not trip a Check Engine Light, we cannot guarantee that all of the codes will be in the “ready” state." I need to pass MD emissions.

 

[ckenda1]

I think that's just a CYA statement. Their lead tech says he runs their catless DP on his FiST and always passes emissions. If you're interested in their DP PM [email protected] here.

 

[Fast64ranchero]

You might need to get a tune to stop the CEL from popping. Other then that, a 3" down pipe works very well.

 

[Juben]

You might need to get a tune to stop the CEL from popping. Other then that, a 3" down pipe works very well.

The CP-e downpipe includes a fouler that's placed between the downpipe and O2 sensor to prevent a CEL. It comes with several fittings so it's tunable. I just used the smallest fitting and it's worked fine.

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