1"x50' Motorcycle Black Exhaust Header Wrap Fiberglass Heat Shield Sleeve Wrap with Stainless Steel Zip Ties (Pack of 8) 1/17" x 1" x 50' Roll black fiberglass exhaust heat wrap wiht 8 X 7.8" long locking ties . Fiberglass exhaust header wrap can create more horsepower and reduce under hood temperatures a realistic 50% . Read the instruction first when start to wrap it ,Wrap headers to protect plug wires,downpipes to increase velocity, motorcycle pipes to prevent leg burns etc Good for harley exhaust pipes insulation .Great improving car and motorcycle performance. Durable, tight woven, easy heat shield insulation .