I have a new FMF Mega bomb header and new FMF powercore TI silencer for ktm XC. The silencer comes with U.S. forest spark arrestor that can be removed. I bought this and have never put it on my ktm 525xc but now I have the KTM 505 SX and it won't fit it. If you would like let me know and I can email you pictures. I am asking $550 shipped in the U.S. It cost me a lot more then this.