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A bike doesn't spew that much HC, but the trucks with cats deleted are really bad - one of those probably spews out as much as 100 "normal" cars, if not more

10 lbs on the street isn't going to mean much of anything, and it's carried low on the bike. Aftermarket exhaust is also warranty issue
But you already got a Bren tune which is a warranty issue and yes they can know if you flash back to stock.
Getting rid of the cat lowers the heat. You are still using all the sensors with the Akra header, you are just dropping weight, lowering heat and gaining another 10 hp of midrange power.
It also somewhat depends on the dealer about the exhaust warranty garbage.
 

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2021 s1000rr
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Dropping weight is critical to any performance machine.
Headers make a solid choice for performance, what is gained with flow and weight savings alone headers are a no brain er... The sound is glorious and the looks are great too.. headers IMHO should be the first thing done to this bike. Oh and good tires... something really sticky.
 
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Dropping weight is critical to any performance machine.
Sure - but 10 lbs isn't going to matter on the street, it just doesn't. Tires make a far bigger difference.

If you're setting lap times on a track it matters. Unfortunately that's not in the cards for me at this time, but I enjoy riding in the mountains. Loud bikes piss people off. Sometimes less noise is good.
 
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