Turbo Insulating Kit 4 Cylinder This kit was 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 a substantial amount of material to cover turbos from the smallest automotive application to heavy- duty truck applications. two turbo kits are available: a 4 cylinder kit and one for 6 & 8 cylinders.