View Single Post
Old 12-02-2016, 10:44 PM
gimpyhauler's Avatar
gimpyhauler gimpyhauler is offline
Join Date: Apr 2011
Location: klamath Falls, Oregon
Posts: 131

From what I've been reading, while there is more unrestricted airflow in the larger pipe, it also changes the power curve designed and programed for the vehicle as built. The larger pipe decreases the power at the normal zone we drive in. The "more power" is now both higher and lower than it was at our normal cruise speeds. Therefore, more power applied. I just keep reading the reports from the "regular guy on the street (smile) that while they love the new sound, their mileage always seems to be a bit lower than they hoped.

Since mileage is a significant issue in most buyers, and all brands being basically the same, if it was as easy as giving us just a little extra steel (cheap material cost) in a .5 or 1" larger exhaust pipe and gain significant improvements, would the big maker do it just to stand out as the best? I understand them going cheap on things like shocks, but something so cheap that would make them stand out on mileage just doesn't seem like something they'd miss. Not for something so high on all buyer's minds as mileage.

The only thing I've done lately to improve my truck is adding a new Bradford Built Flatbed after my OEM bed got smashed while parked and unoccupied in my driveway.
2007 GMC Sierra Classic 2500HD CC/LB (LBZ)
211,000 miles / DVD player
Kennedy Diesel Tuned Computer
Manually extended towing mirrors
Winter Grill Cover/screen
Tough Country front bumper
12,000# Warn Winch
KC Fog Lights
KC 130w Driving Lights
Bradford Built Flatbed
Firestone Ride-Rite Air Bags
More things covered by crochet than I'll admit.
Reply With Quote