High-Flow Catalytic Converters

[mustangflanagan]

Notice any power increase?

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[Demonic]

Probably should have asked you to weigh the stock vs the new ones. Guessing you don't happen to have the weight of each? Are you doing a before/after dyno?

 

[Bulldogs22]

Probably should have asked you to weigh the stock vs the new ones. Guessing you don't happen to have the weight of each? Are you doing a before/after dyno?

^^^This. If we can get weights and a third person dyno to confirm the power numbers with someone from the forum then that would be great.

 

[GaryGolz]

Probably should have asked you to weigh the stock vs the new ones. Guessing you don't happen to have the weight of each? Are you doing a before/after dyno?

We have OEM and Sport Cat weights, I believe it was near a wash if not a single lb difference.

EDIT: Yup, gained a single lb

https://www.fabspeed.com/fabspeed-shelby-gt350-gt350r-sport-catalytic-converters-2016-2020/

 

[GaryGolz]

Notice any power increase?

I do notice a difference while driving, yes, albeit slight. Looking forward to some of the early adapters to get theirs soon to get other dyno comparisons - the DynoJet used on my car for figures was an all-weather dyno.

 

[Demonic]

Oh you mean you're dyno was the one they used for their website?

 

[mustangflanagan]

Any idea how these will hold up to boost.. I am really considering these.

 

[honeybadger]

I've seen a lot of stock dyno pulls of 350s and the red line looks to be 15-18 or so hp down compared to what I've seen. Will be very curious to see if anyone can replicate as I would expect to see 485-490 whp with a claim of +20 hp.

 

[GaryGolz]

Any idea how these will hold up to boost.. I am really considering these.

Sure, happy to add input and good news.

These are the same catalytic converters that Fabspeed uses in the McLaren 720s and Porsche 992. Right out of the gate they're comfortable handling 710 HP+.

However; when using these catalytic converters anything over 100 octane fuel, including race fuel, unfortunately, voids all warranties with the HJS German Cats.

Ideally, these cats fit the owner who is performance and sound focused, but also interested in seasonal track days. There is an option for V-Banded clamps to simply swap out the HFC to Cat Bypass, therefore saving the life of the catalyst for street use.

 

[Creedog]

I am in the interested group for this HFC system. Unfortunately I cannot afford it right now. I occasionally track the car
(3-4/year prior Covid) but curious if I stay with the cats on, is this going to be an issue later on? I always use 93 octane as recommended and not interested in the off road pieces to switch out for track use. I’ll bolt the HFC’s in and keep them on for daily/mountain drives and track days. Should I be concerned?

 

[GaryGolz]

I am in the interested group for this HFC system. Unfortunately I cannot afford it right now. I occasionally track the car
(3-4/year prior Covid) but curious if I stay with the cats on, is this going to be an issue later on? I always use 93 octane as recommended and not interested in the off road pieces to switch out for track use. I’ll bolt the HFC’s in and keep them on for daily/mountain drives and track days. Should I be concerned?

Good question, I thought of similar details since I track mine.

It won't be an issue, no. If you're running 93 octane and not messing with additives or tuning the catalysts can take it and won't break apart. Anything waning on the more aggressive side with racing the vehicle regularly or race fuel will most likely reduce their life and would probably be better off going catless anyway.

 

[LFG_Cory]

So paranoid question time.......does doing this potentially mess with the warranty?

 

[GaryGolz]

So paranoid question time.......does doing this potentially mess with the warranty?

None - no effect these are completely bolt-on products. You won't be cutting, welding etc. The Magnuson moss act protects you, as the consumer. For what it's worth, I would still contact and check with your dealer as it's good to have them in your corner.

 

[LFG_Cory]

Cool. Thank you.

 

[WildHorse]

new Fabspeed high-flow catalytic converters

Coulda just bypassed fabspeed and got em straight from HJS catalysts. Unless you just wanted a bolt-on affair.

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