Hedman Hedders 58150 Long Tube Exhaust Headers for Oldsmobile 400-455 Big Block

The Hedman Hedders 58150 Street Headers are engineered to deliver substantial horsepower and fuel economy improvements for Oldsmobile 400-455 cubic inch big block engines. These long tube headers feature 1-3/4 inch primary tube diameter and 3 inch collector size, constructed from mild steel with 18-gauge tubing and designed for optimal exhaust flow.

Key Features:

• Long tube one-piece header style with 1-3/4 inch primary tubes
• Ball and socket style gasketless collector attachment with 3-inch collector
• Standard flange style with 0.3125 inch flange thickness
• 3-bolt flange collector attachment with reducers included (2.5 inch exit diameter)
• Temporary non-high temperature paint finish
• CARB E.O. Number D-167-27 certified for emissions compliance
• Lifetime warranty against defects including cracks in tubes and welds

What's Included:

• One pair of headers with head flange gaskets
• Collector flange gaskets and 3-bolt exhaust adapters
• All necessary gaskets and mounting hardware

These headers are designed to fit vehicles as originally equipped from the manufacturer. Includes parts necessary to retain emission devices for 50-state compliance, and modification to stock exhaust may be required to retain catalytic converter. Manufactured in the USA by Hedman Hedders, a performance exhaust header manufacturer since 1954.