Quote Originally Posted by mjb929rr View Post
13.9 without a doubt. We run that on a sl550 at 5k feet and the 16x17 at lower elevation. I almost all pecan Interior with just black accents. I went with black thread. I would Match the thread color to one of the interior colors, preferably the one that is the accent.
I should have mentioned. I absolutely would go with the 450 minimum in the new sl. Its almost identical in weight and ballast to the SE. at my typical elevation of 2900 feet the 550 is working when loaded up.