HMF Engineering

041403706071-JETKN-DFS7-12

HMF Yamaha YFZ 450 2004 - 2009 Slip On Exhaust & Dynatek FS Ignition & JET & K&N

Complete Systems

The Performance Series uses a 2 1/8" non-restrictive core for maximum flow.
Depending on the model, you can expect a 4-6 dB increase over stock.
The exhaust shell is made of T6061 Aluminum that weighs substantially less than stock.
USFS Approved: All HMF off road exhausts come with a USFS approved spark arrester.
Two Year Warranty: HMF Engineering Inc. warranties all exhaust systems for two years from the date of purchase for all manufacturing defects.

The HMF Performance Series has a specially designed, unrestricted core that allows the exhaust to increase power evenly throughout the entire power curve. It also features the signature HMF sound with industry-leading end cap and color options, giving you a completely custom look.

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