Downpipe Advice

[Nefarious]

Hi,

Was hoping to get info on which downpipe to purchase from here https://speedindustry.com/toyota-gr-2020-supra-performance-downpipes
Currently going to pair it with an Armaspeed Intake and HKS Exhaust system from them as well since they are the cheapest I found so far.
I live in California so we all know how crappy the emissions laws are.
I've read that if you don't mind the loss of power and don't want the nasty smell from a cattless downpipe, go with a catted downpipe instead.
Since the downpipes listed are all catted, wouldn't they all perform the same?
Only shooting for about 500WHP after an ECU unlock and tune.

Thank you for your time!

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[toxicity]

https://speedindustry.com/active-au...WvdMgg81D5SseOIXtmLIDAmyYfcemuPoaAu_cEALw_wcB

U'll be fine w a high flow catted dp but some throw a CEL.
AA would be a popular one that does not throw a CEL.
I believe CES uses AA in their 600 hp packages.
https://cesmotorsport.com/shop-all-parts/ols/products/ces-motorsport-mkv-supra-600

 

[Meraki Autoworks]

https://merakiautoworks.com/products/active-autowerke-supra-mkv-a90-a91-signature-catted-downpipe

AA all the way. Catted for being CA.

-Josh

 

[Extreme Power House]

Active Autowerke uses EPA approved GESI cats, it wont trigger the check engine light and its good for up to 850 whp

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