Hooker 2817-1HKR Super Competition Long Tube Headers Ceramic Coated for Big Block Chevy GMC 4WD

The Hooker 2817-1HKR Super Competition Long Tube Headers are engineered to deliver maximum horsepower and torque for Chevrolet and GMC big block 396-502 cubic inch engines in 4WD applications. These premium ceramic-coated headers feature precision-tuned primary tubes that create optimum exhaust pressure, resulting in enhanced low-to-mid range torque without sacrificing top-end power.

Key Specifications:

• Primary tube diameter: 1-7/8 inch (1.875") x 31 inches long
• Collector diameter: 3 inches
• Collector length: 10 inches
• 3-bolt collector flange attachment
• Flange thickness: 5/16 inch machined flanges for leak-free seal
• Tube gauge: 18-gauge steel construction
• Silver metallic ceramic coating for heat management and durability
• Port shape matches factory cylinder head ports

Performance Features:

• Tuned-length primary tubes maximize exhaust scavenging and velocity
• Long transition collectors reduce backpressure for improved flow
• Mandrel-bent tubing ensures smooth, unrestricted exhaust flow
• Full-length header design optimizes power curve across entire RPM range
• Professional-grade welds for maximum durability

What's Included:

• Pair of ceramic-coated headers
• Premium exhaust gaskets
• Complete mounting hardware and bolts

Important Installation Notes:

• Designed for 4WD applications only
• Compatible with stock floor shift linkage; column shift requires aftermarket linkage kit
• Racing use only - not legal for emissions-controlled vehicles
• Do NOT use for engine break-in - ceramic coating damage will void warranty
• Ceramic coating requires several heat cycles to fully cure
• Header wraps not recommended as they void warranty and can cause tube cracking
• Header reducers sold separately

Hooker Super Competition Headers represent decades of racing-proven exhaust technology, delivering the performance gains serious enthusiasts demand whether for drag racing, off-road applications, or high-performance street builds.