Heat Shields & Replacement Tips. 495, Heat Shields for Crusher Mufflers (pr) .The Crusher name has become synonymous with performance. Performance throughout the RPM range! Looks to die for & quality only Küryakyn can bring you. Crusher Mufflers are acoustically tuned for that deep low rumble you will love - they provide lower decibel levels at cruising speeds & an authoritative growl at wide open throttle. High tech stainless steel packing provides added longevity.