Are the stock mufflers on CBR 1000 F made of alumin or steel? On pictures they are black, but is that just a steel cover with internal alumin mufflers? My CBR has alumin mufflers, dont know if they are aftermarket or stock.

 

steel. Very bloody heavy stel. My complete system weighs as much as one of the old mufflers.

 

Thanks, one step closer to a Moto GP bike nowing it has lightweight mufflers The mufflers have no fabrication identity, thats why I didnĀ“t know at all. However, they look pretty nice and sounds fine.