Vehicle Fitment: 

2011, 2012, 2013, 2014, 2015, 2015.5, 2016 Chevrolet Silverado & GMC Sierra 2500 & 3500 6.6L Duramax Pickup trucks.
Will not fit Cab & Chassis trucks.

Features:

         3" Stainless Steel piping
         20% better flow than the factory pipe
         Includes heat-wrap to keep engine bay temperature
         Will not affect emissions systems
         Maximum flow for competition applications

Difference Between 2015 & 2015.5

Please refer to the image shown on the product page! 

The difference is shown at the DOWN PIPE section.

If you have a V-band clamp as seen in the image above on the left Select 2011-2015.

If you have a 3-bolt flange on the right as seen in the image above on the right Select 2015.5-2016.

* Note: Alaska, Hawaii and some Canadian locations will be subject to additional freight charges