Do you think this combo will gain the same amount of power that the XERD headers will give you? I was thinking of going with the XERD headers at first but have changed my mind due to getting in trouble before not having cats. Just to much of a risk while trying to keep warranty. I know almost everything will void the warranty, but at least I can try to keep it not so bad by having cats. Just hoping for a 14hp gain with both.

 

you can always use the xerd full length headers with a custom exhaust and have some cats that bolt on and off.