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View Full Version : what is a good exhaust for a grizzly 660



6858-400ex
03-19-2005, 10:00 PM
what is a good slip on that gives the most power

tom400ex
03-22-2005, 07:53 AM
HMF penland series Pipe:devil:
Thats what I got. It's loud as *****, but it rips:D

Wahb
03-23-2005, 06:03 AM
HMF Utility Series is good too. I run it with the Quiet Core, its not obnoxiously loud, not a lot louder than stock really, but yielded some good gains with proper jetting.

397ccEX
03-31-2005, 05:15 PM
uti;lity series hmf
just put one on my rancher it soundsl ike thunder and gainde torque too

CHAR250R
04-01-2005, 10:37 AM
I have the Big Gun on my 03 Grizzly. I have a relative with a stock 03 Grizzly, and we did some drag racing to see if the pipe made a difference. My Grizzly was a little faster off the line, and his was better on top end. If I had to do it all over again, I would have left it stock. It didn't make that much of a difference.