The only difference in our kits for the 2007 and earlier Honda TRX 400EX or 400X’s is that they have 12mm diameter tie rod threads instead of 10mm threads that are on later models.
Stock brake lines should be long enough to install either the +4.5” or the +6.0″ kit if you disconnect the intermediate brake line support on the a-arms to provide more slack in the lines.
Diamond J Customs does sell brake lines if you would prefer to use extended-length stainless steel braided brake lines with your widening kit.
You can find more general information about our widening kits under the Front Widening menu on the Home Page.
Instructions Download: H400_SWID_tri-fold_instr