Yes, you can replace the arms on your 10k system so it has the same rating as the # FA92-00-0600. The correct replacement bars are the # FA92-02-0699. This will give your Fastway e2 a tongue weight rating of 250 lbs - 600 lbs so make sure the tongue weight of your loaded setup falls into that range. If a range of 400 lbs - 800 lbs would be more appropriate you can use the arms from the 8k system # FA92-02-0899. view full answer...