Which de-cat?

[Sofauxboho]

Anyone on here have experience with the various products that allow you to remove the catalytic converter on a 701?

Some of them have a "bulge" in the middle, while some go straight through. What's the point of the bulge?

Has anyone done actual dyno runs that show what power gain / loss you get with one of these?

Here's the Arrow decat, with the bulge:

Here's the Bad Winners decat, without the bulge:


And here's a cheap made in China decat from eBay, also without the bulge:

 

[Ray R]

I believe the bulge is a tuning feature to regulate back pressure and sound pulses.
I have the Arrow because they put some thought and r&d into their design vs a straight through pipe.

 

[BISavage]

I think the remus looks the coolest, and has an optional cat available if the smell is important to you:



But other than the akro full pipe, with a decat you will gain somewhere and lose somewhere else, and its really up to the tuning to keep the bike in check.

Probably the weight loss / change to center of gravity is more noticeable than anything else.

 

[Sofauxboho]

But other than the akro full pipe, with a decat you will gain somewhere and lose somewhere else, and its really up to the tuning to keep the bike in check.

Do you have a link to the Akrapovic full exhaust system for the Vitpilen 701? I'm quite interested, but can't seem to find such a thing anywhere.

 

[BISavage]

Its the 690 one,

KTM 690 Duke and Vit 701 Exhaust Compatibility

Anybody know if the pipe for a KTM 690 Duke will bolt up to a Vit 701? They look very similar. I'm considering the Akra complete exhaust that has the increased volume in the middle (similar to a cat in location) to help reduce the midrange decrease with a decat. Pipe is 76005907100 - picture...

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Post in thread 'Track Vits?' https://hqvadventure.com/forum/threads/track-vits.272/post-4844