I installed a Delkelvic because of the reviews and price. Got the carbon fiber shorty. It looks awesome and sounds great. I do like the sound of two brothers or leo Vance but for the price you can't beat Delkelvic. You absolutely need a fuel controller too. I installed both myself, it was...
I have a 2015 and put headers and a fuel controller. Before adjusting the fuel controller it ran terrible. After a few tweaks it runs awesome. I strongly suggest a fuel controller.