I've got two questions regarding possible exhausts for a 426: 1. Will a WR400 Spark Arrestor/Silencer work on a 426 ? 2. Will a FMF Power Core Sliencer for a 99 400 fit/work on a 426 ? Need the spark arrestor for the occassional dune ride. The FMF silencer is a freebie from a friend. Appreciate your inputs.