11-16 KTM 250SX: Pro Circuit Factory 304 Silencer - 2-Stroke With a clear and stylish design, the 304 Silencer will make a lasting impression. The slightly longer body offers reduced noise output when compared to the R-304. Its perfectly constructed lightweight cylindrical canister, combined with the brushed aluminum body and stainless steel inlet tube and end cap, give you a silencer that looks as good as it performs and ensure that a truly unique riding experience is in st The 304 silencer is recommended for most two-stroke applications.Longer body design helps to reduce noise output.6061-T6 brushed aluminum silencer body.Stainless steel end-cap.TIG and MIG welded for strength and durability.Double-walled mounting bracket(s