[Leooo]

Yea,and you better get yourself a good set of snap ring pliers,anything less that 8in or 9in wont work.

 

[Leooo]

I used the quiet baffle for a while until I had my bike on the dyno... that baffle is so restrictive it's a joke. It cut a stack of Hp off my 1000. Seriously, blue line is with the quiet baffle. Red line with the standard baffle after the dyno tune.

Use it if you have to, but it's gonna cut the balls off your bike. I wouldn't say that the M4 GP is cop bait either. I have had zero problems with my exhaust on the street. Riding like a dick head is the real cop bait.

I have it on my bike currently and I can tell it is quite restrictive,but isn't some back pressure needed?My bike has a de-cat so that's why I installed it in the first place.

 

[Leooo]

I had the same result. I was using a different brand, not m4. It was a Coffman shorty with a baffle in it. I also lost 20 HP from my Yosh slip on. My k4 750 likes a longer exhaust, and the back pressure. Runs much stronger with the Yosh back on.

Im confused,You said your Yoshi also caused issues but it runs better with it on?

 

[Leooo]

Does anyone have any dyno sheets to prove these "20hp" losses?

Mugget posted one a few posts up.

 

[Leooo]

Coffman shorty muffler with a db-killer caused the issues. 20hp loss compared to Yoshi.

Ah I see.