Search results
-
1
06 8.1L Vortec Tuning
I have an 06 8.1 with Allison 6 and 4:10 gears. Stock I got 14mpg highway unloaded. 6 mpg with 12,500lbs. After a cold air intake, ram air hood, mufflers, and tune I was getting 16mpg unloaded highway and got 9.5 mpg with 12,500lbs. Now I did a cam, roller rockers, modified intake, 90mm throttle...- 1970SS8.1L
- Post #49
- Forum: Things that use Spark Plugs