Copper Exhaust Nut Kit

Copper Exhaust Nuts Won'T Seize On The Studs. These Are Specially Designed 8Mm Nuts With A 12Mm Wrench Size For Exhaust Headers. They Give The Extra Clearance Needed With Some Large Diameter Header Systems, But Best Of All You Wont Break Off The Exhaust Stud Due To The Nut Seizing On It. Sold In Sets Of 8.