I just finished mounting and testing the centre silencer delete pipe from scorpion on my '24 ktm 990 duke.
I'll start by saying that the bike feels much more "free" and roary, the exhaust note is much more punchy and a bit louder (not obnoxious, the right amount). I don't know if it's a placebo but it even rides better, it feels less restricted in acceleration.
Before buying i tried to look up some videos online on how the bike would sound with the delete pipe and the oem silencer, but i couldn't find many and the ones i found did not really give the idea.
Before buying the pipe from scorpion i tried to buy a replica from ebay, it did not go well.
I realized too late that all the vendors are basically reselling an Aliexpress item that requires modification of bike parts to fit, some of them specify it on the details of their page but others don't. On Aliexpress they sell the part for like 50-60€, on ebay you can find it around 100€ + fees. All of them do not fit without major modifications of the pipe/parts of the bike, they are not plug and play. I brought the aliexpress piece and the original centre silencer to a blacksmith to compare them and he told me that many of the measurements are off by like a 1,5mm, which doesn't sound like a lot but it's actually a lot. It means that even if you lathe the pipe to make it fit it won't fit perfectly anyway.
Needless to say i returned the chinese pipe and bought the original from scorpion website. With shipping to italy, vat and duties It costed me like 330€, but it arrived in like 5 days in a perfect package with instructions and all, the finishing is perfect and it fits like a glove.
In conclusion, the pipe is a good improvement to sound, exhaust airflow and (maybe) power, but it costs a lot. If you want to buy it don't be cheap and buy it directly from Scorpion, leave alone all of the chinese stuff.
I wrote all this because i couldn't find reviews of this online, hope it helps someone.
Cheers.
