The T-6 Stainless Steel Exhaust System offers the same benefits as the Ti-6 Titanium Exhaust System, but the T-6 is constructed of stainless steel throughout the head pipe, mid pipe and end-cap while the canister is constructed of aluminum for increased durability and a more affordable alternative to titanium. Although the T-6 will not pass FIM sound requirements seen in professional racing here in the states or in Europe, the T-6 is still a great system for any off-road rider or closed course racer in terms of improved performance, durability and its inexpensive price tag. In addition to all of these features, the T-6 will come with a removable USFS approved spark arrestor making it easy for riders to alternate between off-road and closed course racing. Features Include: Improves performance Stainless steel construction throughout head pipe, mid pipe, and end-cap Aluminum canister construction Machined aluminum muffler bracket for increased strength and durability Asymmetrical muffler configuration for increased packing volume Removable USFS approved spark arrestor TIG precision welding Made in the USA Features Include: Offering maximum performance while meeting AMA amateur noise requirements Ideal for closed-course or off-road racing Titanium construction throughout head pipe, mid pipe and canister Carbon fiber end-cap construction Machined aluminum muffler bracket for increased strength and durability Asymmetrical muffler configuration for increased packing volume Removable USFS approved spark arrestor TIG precision welding Made in the USA