HMF Engineering

841404708286-JETKN0410

HMF Yamaha YFZ 450 2004 - 2010 Borich Full Exhaust Muffler & JET + K&N Filter

Complete Systems

Developed in conjunction with 4X GNCC Champion Chris Borich
2 " diameter internal core for maximum flow and powerful race track sound
Exclusive Signature X Series pewter powdercoating with polished Euro end cap
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.

Chris Borich is, without a doubt, the highest performing GNCC rider of our modern time. Working hands on with Borich in developing the Signature X Series really highlighted some of the key points in the horse power it created. Endless amounts of testing and tweaking has brought on a larger diameter core that provides more surface area for producing more horse power. The specially designed perforated core allows for more air flow, which increases the horse power and torque gains in the upper RPM range.

Diamondite® Glass & Surface Cleaner 6 oz
Voltage Regulator TOOGOO MC34063A Dropout 065664
Mix me 3748