LS Chevy LS1 LS6 LS2 1997-2003 Cylinder Head Stud Kit 4.8L 5.3L 5.7L 6.0L 33380 Coolant Flanges OD roughly 3

OD roughly 3

Designed for equal flow between all runners so that there's minimal chance of leaning out Cylinders 5 & 6

Commonly known performance issues with OEM Honda/Acura distributor igniters cause many people to convert to more reliable COP (coil-on-plug) style ignition systems

This header delivers the best peak horsepower gains while utilizing a 2 piece design

LS Chevy LS1 LS6 LS2 1997-2003 Cylinder Head Stud Kit 4.8L 5.3L 5.7L 6.0L 33380 Coolant Flanges OD roughly 3Chevy LS1 LS6 LS2 1997 2003 Cylinder Head Stud Kit 4. 8L 5. 3L 5. 7L 6. 0L 33380 LQ9 Fit: 1997 2003 LS1 LQ9 4. 8L 5. 3L 5. 7L 6. 0L engines Specs: 12 Point Nuts Grade 8 Black Oxide Finish Washers and Nuts Included Sold as Kit 11mm bolts are 70ftlbs torque 8mm bolts are 25ftlbs torque