T-6 Complete Exhaust. The T-6 Stainless Steel Exhaust System offers maximum performance and is constructed of stainless steel throughout the head pipe, mid pipe and end-cap while the canister is aluminum. The T-6 is perfect for any closed-course or off-road racer looking for improved performance, durability and a professional look. More features offered by the T-6 are the ability to meet AMA amateur racing sound requirements and that it comes equipped with a United States Forest Service (USFS) approved spark arrestor making it easy to alternate between off-road and closed-course racing. Improves performance. Stainless steel construction throughout head pipe, mid pipe, and end-cap. Aluminum canister construction. Equipped with RC-4 Resonance Chamber to reduce noise output (most models). Machined aluminum muffler bracket for increased strength and durability.