BAK Flip MX4 6.6″ for Sierra / Silverado Single Cab 2014-2020

The BAKFlip MX4 model 448121 (replacing #48121) – If you are looking for a 2014-2018 GMC Sierra / Chevy Silverado hard folding tonneau cover that literally does it all, the BAKFlip MX4 from BAK Industries is it. From its sleek contemporary styling to its state of the art function, the BAKFlip MX4 hard folding heavy-duty truck bed cover has been enhanced with a premium density foam core, upgraded latch housing components, and an all-new integrated tailgate seal that allows the tailgate to be closed with the cover up or down. Made in the USA!