worked perfect for my exhaust and only requires simple cutting tools scissors razor and marker perfect for high boost good quality bought as a mouse pad good plus wire separators work well and cheap five stars have aftermarket 8mm plug wires and these gems fit like a glove what i use great for dandruff and dry to oilycars excellent addition to your car wash kit great stuff that smells good i was so happy to come across this great for what it is it would rate 5 stars if that worked correctly everything else works good i like the shock case five stars