Yamaha Grizzly 660 (2002-2008) HMF Performance Series - Full System Exhaust

Yamaha Grizzly 660 (2002-2008) HMF Performance Series - Full System Exhaust is HMF's Performance full system exhaust for the Yamaha Grizzly 660, with an aluminum shell, even power gains across the RPM range and HMF's deep, aggressive sound.

Full System Aluminum Shell Made in USA

WHY RIDERS CHOOSE IT:

• 6063-T6 aluminum shell with HMF's deep, aggressive trademark tone
• 2 1/8" unrestricted core with a special hole pattern for even power across the RPM range
• More horsepower and torque than the stock exhaust
• Made in the USA by HMF Racing

FINISH:

Ships in Brushed with a Turn Down - Brushed end cap (HMF part 041284606071).

TUNING:

HMF recommends a fuel tune, such as the HMF Optimizer or a Dynojet controller, with any exhaust upgrade, especially full systems.