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NeilBlanchard · 12-10-2009, 04:42 PM

Some backpressure is a good thing -- the engine often needs it to run well at lower RPM's.

I think that if better FE is your goal, changing mufflers won't help.

12-10-2009, 04:42 PM	#7 (permalink)
NeilBlanchard Master EcoModder Join Date: May 2008 Location: Maynard, MA Eaarth Posts: 3,939 Mica Blue - '05 xA RS 2.0 Team Toyota 90 day: 47.48 mpg (US) Josepha - '08 xD 90 day: 30.76 mpg (US) Thanks: 512 Thanked 501 Times in 306 Posts	Some backpressure is a good thing -- the engine often needs it to run well at lower RPM's. I think that if better FE is your goal, changing mufflers won't help. __________________ Sincerely, Neil http://neilblanchard.blogspot.com/