Those DH owners with Ford Performance SC Weigh in

[Q6543]

I don’t have a check engine light, I used autozone spark defoulers
And no, we don’t have any emissions testing in Mi.

if we did I’d be driving a Tesla plaid by next week.

Sponsored

 

[smurfslayer]

I don’t have a check engine light, I used autozone spark defoulers
And no, we don’t have any emissions testing in Mi.

if we did I’d be driving a Tesla plaid by next week.

Heretic!

BURN HIM!

 

[cobra4548]

Thanks everyone for input. I’m only daily driving mine and don’t plan to do any racing. I believe if Ford needed cats to be replaced or removed they would have required it. I’ve had GT500s and daily driving them I rarely got into heavy boost. Again I appreciate all the input. I’ve ordered my kit and it will be installed at a local dealership that I trust.

 

[Junkyard Dog]

You could buy cats for this level of power that would live, but, you'll lose some hp and noise, and they are expensive AF.

I doubt you would lose any horsepower. Some of those cats have 4" inlets and outlets. They are made for flow in addition to being made to live with extremely high horsepower.

 

[Junkyard Dog]

Joe Fabiani gives a fundamental lesson in catalytic converters in a 2024 post on a corvette forum.

https://www.corvetteforum.com/forums/c8-tech-performance/4833086-exhaust-mods-c8z.html

See post #4

 

[Q6543]

OP, the gt500 and DHSC have a larger 2-3/4” cat piping with a stronger honeycomb design.

The OEM cats on the 5.2 are excellent as far as having to have them.

 

[robvas]

Maybe someone else will remember more, but I recall reading that even the cats you get with the headers are good for maybe 500hp, which I am assuming is crankshaft hp. Stage 1 whipple is putting out about 800 crankshaft hp, and more. Stage 2 can be 700+ to the wheels or more.

Depends, I haven't had any issue with the cats that come with my Kooks headers, and if you really need more than that there's GESI cats

 

[smurfslayer]

Depends, I haven't had any issue with the cats that come with my Kooks headers, and if you really need more than that there's GESI cats

Good reminder.
I looked at the GESI as well, and they're pricey for these kinds of HP levels.

 

[Junkyard Dog]

Good reminder.
I looked at the GESI as well, and they're pricey for these kinds of HP levels.

I also cannot figure out if there is a way to install them under a Hellion twin turbo system. It looks like the turbos go where the cats would go and the the high priced cats would hang down too low.

I know, different consideration from the Whipple, but a consideration for anybody thinking of going turbo.

 

[Hadelson]

Good to keep in mind - flywheel vs wheels. My 2019 RoushCharged had 720 hp. Not sure if flywheel. Probably at wheels. It was just a GT Premium with supercharger & Roush mufflers. No problem with cats for street driving which is what I do with occasional romps for fun. Thanks for the tips. Issue clearer now.

My 19 Roush RS3 ate passenger side cat at 12k. Ford replaced under warranty no questions asked.

 

[cobra4548]

Here she is in all her glory. Just got her back today from the dealership. I also replaced the half shafts with the Ford Performance ones. Waiting on the exhaust to show up to get it installed. I am very happy with it so far.

 

[Dragster]

Here she is in all her glory. Just got her back today from the dealership. I also replaced the half shafts with the Ford Performance ones. Waiting on the exhaust to show up to get it installed. I am very happy with it so far.

Looks good! Will the hood close properly with that strut tower brace? I heard they don’t fit.

 

[Ninjak]

Here she is in all her glory. Just got her back today from the dealership. I also replaced the half shafts with the Ford Performance ones. Waiting on the exhaust to show up to get it installed. I am very happy with it so far.

Looks good!

Would also like to know about the tower brace. Is it functional or more of a "looks" brace? I have also read that the brace will not fit.

As of this thread, I have moved to stage two Whipple setup, and am installing Kooks headers, the performance connection pipes, and a Corsa double H. I decided to forgo the CATS, as I live where there are no inspections.

 

[cobra4548]

Looks good! Will the hood close properly with that strut tower brace? I heard they don’t fit.

Thanks!

Looks good!

Would also like to know about the tower brace. Is it functional or more of a "looks" brace? I have also read that the brace will not fit.

As of this thread, I have moved to stage two Whipple setup, and am installing Kooks headers, the performance connection pipes, and a Corsa double H. I decided to forgo the CATS, as I live where there are no inspections.

Looks good!

Would also like to know about the tower brace. Is it functional or more of a "looks" brace? I have also read that the brace will not fit.

As of this thread, I have moved to stage two Whipple setup, and am installing Kooks headers, the performance connection pipes, and a Corsa double H. I decided to forgo the CATS, as I live where there are no inspections.

Thanks. It fits fine. Hood closes just like it should. As for function I haven’t thrown it into a curves yet so I don’t know yet.

 

[Billycar11]

Looks good!

Would also like to know about the tower brace. Is it functional or more of a "looks" brace? I have also read that the brace will not fit.

As of this thread, I have moved to stage two Whipple setup, and am installing Kooks headers, the performance connection pipes, and a Corsa double H. I decided to forgo the CATS, as I live where there are no inspections.

if its the vmp one with a ford performance sticker slapped on it ,its not functional
and that is what it appears to be the vmp one

Sponsored