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21104HKR Single 2 21104HKR
Single 2" Offset Inlet, Single 2" Center Outlet
Super Competition Turbo Mufflers apply careful use of aerodynamic principles to achieve maximum flow and the lowest back pressure of all popular turbo mufflers tested. 
21105HKR Single 2-1/4 21105HKR
Single 2–1/4" Offset Inlet, Single 2–1/4" Center Outlet
Super Competition Turbo Mufflers apply careful use of aerodynamic principles to achieve maximum flow and the lowest back pressure of all popular turbo mufflers tested. 
21106HKR Single 2-1/2 21106HKR
Single 2–1/2" Offset Inlet, Single 2–1/2" Center Outlet
Super Competition Turbo Mufflers apply careful use of aerodynamic principles to achieve maximum flow and the lowest back pressure of all popular turbo mufflers tested. 
21107HKR Single 3 21107HKR
Single 3" Offset Inlet, Single 3" Center Outlet
Super Competition Turbo Mufflers apply careful use of aerodynamic principles to achieve maximum flow and the lowest back pressure of all popular turbo mufflers tested. 
21108HKR Single 2-1/4 21108HKR
Single 2–1/4" Offset Inlet, Single 2–1/4" Offset Outlet
Super Competition Turbo Mufflers apply careful use of aerodynamic principles to achieve maximum flow and the lowest back pressure of all popular turbo mufflers tested. 
21109HKR Single 2-1/2 21109HKR
Single 2–1/2" Offset Inlet, Single 2–1/2" Offset Outlet
Super Competition Turbo Mufflers apply careful use of aerodynamic principles to achieve maximum flow and the lowest back pressure of all popular turbo mufflers tested. 
21004HKR Single 2 21004HKR
Single 2" Offset Inlet, Single 2" Center Outlet
Competition Turbo Mufflers utilized a low back pressure baffle network designed to flow in either direction resulting in better performance and economy. 
21005HKR Single 2-1/4 21005HKR
Single 2–1/4" Offset Inlet, Single 2–1/4" Center Outlet
Competition Turbo Mufflers utilized a low back pressure baffle network designed to flow in either direction resulting in better performance and economy. 
21006HKR Single 2-1/2 21006HKR
Single 2–1/2" Offset Inlet, Single 2–1/2" Center Outlet
Competition Turbo Mufflers utilized a low back pressure baffle network designed to flow in either direction resulting in better performance and economy. 
21007HKR Single 2-1/4 21007HKR
Single 2–1/4" Offset Inlet, Single 2–1/4" Offset Outlet
Competition Turbo Mufflers utilized a low back pressure baffle network designed to flow in either direction resulting in better performance and economy. 
21008HKR Single 2-1/2 21008HKR
Single 2–1/2" Offset Inlet, Single 2–1/2" Offset Outlet
Competition Turbo Mufflers utilized a low back pressure baffle network designed to flow in either direction resulting in better performance and economy. 

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