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kafer65 · 09-16-2016, 05:25 PM

I picked up 3mpg doing under drive pulleys, stainless headers and 3 inch Gerlisch straight through muffler on my 99 4wd Silverado 3dr. I did much of what you had done first and was frustrated with 13mpg mixed city.

09-16-2016, 05:25 PM	#41 (permalink)
kafer65 Tinkerer Join Date: Apr 2008 Location: Tennessee Posts: 284 Silver - '15 Mazda CX-5 Sport Team Mazda 90 day: 37.23 mpg (US) Thanks: 7 Thanked 63 Times in 54 Posts	I picked up 3mpg doing under drive pulleys, stainless headers and 3 inch Gerlisch straight through muffler on my 99 4wd Silverado 3dr. I did much of what you had done first and was frustrated with 13mpg mixed city. __________________ Mirror deletes, 80% grill blocks, wheel covers, 50 psi tires = 6% better MPG avg. over a year. Wheel skirts overcoming ethanol winter fuel mpg losses and more! http://ecomodder.com/forum/showthrea...ead-30641.html