THESE KITS WERE DESIGNED TO PROTECT AND IMPROVE PERFORMANCE OF THE TURBO. THIS UNIVERSAL KIT WILL KEEP THE TURBO SPOOLED UP: IT VIRTUALLY ELIMINATES TURBO LAG. THE CUSTOM CUT TO FIT KIT COMES WITH SUBSTANIALAMOUNT OF MATERIAL TO COVER TURBOS FROM THE SMALLEST AUTOMOTIVE APPLICATIONS TO HEAVY DUTY TRUCKS APPLICATIONS.