CVF catted downpipe & Flowmaster Flo FX

[mattyblazer]

Anyone mated the 3" downpipe to the 3" exhaust, I tried the search feature... The CVF part comes with a 2.5 step down and I'm looking to go 3" the whole way. I'm guessing I need to cut the cat back at the start before the flex pipe. in addition I added a S&B CAI, seems to run ok the way it is, but it is stupid to choke it off from 3 to 2.5 to 3

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[2021Ranger]

2.5 will support 500 Hp or more but I’m not sure what disadvantage if any 3’‘ to 2.5 to 3’’ will have..

 

[Racket]

I think @CVF-Jason that they offer a 3 inch outlet and the step down is an option..

That said I think going 3 inches is going to be a performance boost behind the turbo but in the Mustang forums as well as here the factory computer seems to want to throw codes de to the change in flow. I'm not sure if that has been universally resolved. I think there is a O2 sensor 'defouler' that needs to be added (?) but they are 'illegal' in America. Maybe one of those foreign vendors who skirt EPA control can 'help.'

 

[CVF-Jason]

I think @CVF-Jason that they offer a 3 inch outlet and the step down is an option..

That said I think going 3 inches is going to be a performance boost behind the turbo but in the Mustang forums as well as here the factory computer seems to want to throw codes de to the change in flow. I'm not sure if that has been universally resolved. I think there is a O2 sensor 'defouler' that needs to be added (?) but they are 'illegal' in America. Maybe one of those foreign vendors who skirt EPA control can 'help.'

The 3" to 3" adapter actually comes in the box with the downpipe!

 

[mattyblazer]

The 3" to 3" adapter actually comes in the box with the downpipe!

The adapter is exactly 3" on one side, I think I'm going to cut a slot in it

 

[Racket]

2.5 will support 500 Hp or more but I’m not sure what disadvantage if any 3’‘ to 2.5 to 3’’ will have..

I honestly don't know if our particular block setup will. Although we're in RWD configuration (think Mustang) I thought we're fundamentally using the Focus RS block which can do a bit better than 400 HP but I suspect the DI system with the single injector is going to be limiting.

 

[LowKeyTremor]

I honestly don't know if our particular block setup will. Although we're in RWD configuration (think Mustang) I thought we're fundamentally using the Focus RS block which can do a bit better than 400 HP but I suspect the DI system with the single injector is going to be limiting.

Interesting and if true, 2.5” would absolutely be adequate. I mean if you’re set up for 3”, then why not. But I certainly won’t hit 500 RWHP, although I do hope to be into the 400s…

But if the engine block makes 500+ HP a bad idea, then no complete need to have more than 2.5”.

That said, to each his own because I’ve certainly done overkills for parts and was fully OK with it

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