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ModelE · 03-28-2009, 02:46 PM

actually, some engines work more efficiently with a bit of backpressure in the exhaust , but usually anything less than stock is good.

03-28-2009, 02:46 PM	#42 (permalink)
ModelE high school Join Date: Oct 2008 Location: Boston, Ma. Posts: 86 sabre - '02 Buick LeSabre Custom 90 day: 23.45 mpg (US) frontier - '04 Nissan Frontier XE 90 day: 18.97 mpg (US) Thanks: 0 Thanked 0 Times in 0 Posts	actually, some engines work more efficiently with a bit of backpressure in the exhaust , but usually anything less than stock is good. __________________