I have a pair of heavy gague abs sail backers with the built in clips . they need covering . for $40 shipped to the 48 or $60 with new blk gray or tan carpet they look better than new when covered in the carpet . . no restrictions of sound. ( auto grade carpet ) ALSO I have a repaired tach chip with 2-100k ohm resistors. for sale $75 shipped . or $50 with your old one.