Pro Circuit T-6 Exhaust System Exhaust Description: Trick out that new CRF110F of yours with Pro Circuit's T-6 Stainless Steel Exhaust System. Equipped with a removable spark arrestor, the T-6 is constructed of stainless steel/aluminum and was designed for durability, demanded by off-road racers and recreational riders. 2013-2018 Features Include: Lightweight and durable Strong muffler bracket TIG welded Asymmetric muffler design for increased packing volume Removable USFS approved spark arrestor 2019-Present Features Include: Improves performance Stainless steel construction throughout head pipe Brushed aluminum canister Carbon fiber end-cap Strong mounting bracket for increased strength and durability Asymmetrical muffler configuration for increased packing volume Removable U.S.F.S. approved spark arrestor Two piece system including head pipe and canister TIG precision welding