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02-03-2015, 03:44 PM
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#1 |
 Drives: 1987 Silverado Join Date: Jan 2010
Location: Texas
Posts: 314
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Full exhaust for MPG gain?
How restrictive is the factory yaris exhaust? In comparison to a good aftermarket unit, that is. Whats the diameter... 1.5 inches? Perhaps the aftermarket exhaust would be a 2" diameter to allow for better flow?
Also to be clear, I'm talking about a whole system. From the header, all the way to the tailpipe. If you replaced that with high end tubing, does anyone know what the MPG gains tend to be? Surely someone on this site has done this. |
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