Features:

• For GM LS engine swaps into 1973-87 GM C-10/20 2WD Trucks
• 1-7/8" primary tube diameter and 3" collector diameter ideal for "hot" LS1/LS6/LS2 or 5.3L-6.0L Vortec truck engine swaps
• Long tube design for optimum engine performance
• Mild steel construction with black ceramic coated finish
• Designed for use with <a href="https://www.holley.com/12621HKR">12621HKR</a> engine mounting brackets and <a href="https://www.holley.com/12646HKR">12646HKR</a> transmission crossmember

About Hooker

Hooker Headers & exhaust systems are engineered to increase horsepower and torque while improving throttle response. Shop the official site of Hooker at Holley.com.

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

• 1965 and older U.S. manufactured California Certified vehicles
• 1967 and older U.S. manufactured Federally Certified vehicles
• 1967 and older Foreign manufactured vehicle

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

The following vehicles are considered Emissions Controlled Vehicles:

• 1966 and newer U.S. manufactured California Certified vehicles
• 1968 and newer U.S. manufactured Federally Certified vehicles
• 1968 and newer Foreign manufactured vehicle