Competition works slip on

I love them and the sound. Wish there were more views of the pipes. Any performance changes, positive or negative? Waiting for a new 2021 R3 GT but want a better sound.
Very loud, some backfires when downshifting as expected but nothing ridiculous. Can't speak to performance other than to say I experienced no negatives. Others have dyno results that suggests a slight uptick in HP and torque. Here are some photos...

 

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Love the sound but not so much the looks. Actually I think the stockers look better and considering no performance upgrade, I'll pass on these. Thanks for the pics and info!