Stainless Steel Long Tube Headers for Chevrolet C/K Trucks Blazer Suburban (1973-1985) 5.0L 5.7L

High-Flow Stainless Steel Long Tube Headers for 1973-1985 Chevrolet C/K Trucks, Blazer, Suburban (Square Body)

What it Does: The Stainless Steel Long Tube Headers replace restrictive cast-iron exhaust manifolds on 1973-1985 Chevrolet C/K Trucks, Blazer, and Suburban platforms to eliminate exhaust backpressure and optimize low-to-mid-range torque.

The Stock Chevrolet C/K Trucks, Blazer, Suburban Exhaust Restriction

Factory Square Body platforms running the Small Block Chevy (SBC) 305 ci (5.0L) and 350 ci (5.7L) utilize heavy, restrictive log-style cast-iron exhaust manifolds. These stock manifolds force adjacent exhaust pulses to collide within short, uneven runners, generating severe boundary-layer turbulence and excessive thermal retention near the cylinder head. This scavenging restriction chokes volumetric efficiency, trapping residual exhaust gas inside the combustion chamber and robbing torque needed for heavy hauling and towing applications.

The Engineering Solution

Engineered for maximum scavenging velocity, these long tube headers feature 1 5/8-inch mandrel-bent T-304 stainless steel primary tubes designed to equalize backpressure across all cylinders. The smooth-radius geometry routes exhaust into large 3-inch merge collectors, producing a sustained low-pressure pulse that accelerates cylinder evacuation on the exhaust stroke. Thick, CNC-machined head flanges resist thermal warping and blowouts under heavy load cycles, while the corrosion-resistant polished finish withstands road debris and sustained thermal stress without rusting.

What's Included

• 2 Long Tube Headers (Left and Right)
• 2 Collector Reducers
• 2 Header Gaskets
• Collector Gaskets
• Mounting Bolts and Nuts

Technical Specifications

Compatibility

• 1975-1985 Chevrolet C10 Pickup Small Block V8
• 1975-1985 Chevrolet K10 Pickup Small Block V8
• 1975-1985 Chevrolet K20 Pickup Small Block V8
• 1973-1985 Chevrolet C10 Suburban Small Block V8
• 1973-1974 Chevrolet Blazer Small Block V8

Frequently Asked Questions & Fitment Warnings

Does this fit the Square Body C/K Trucks, Blazer, Suburban?

Yes, this is a direct fit for the 1973-1985 Chevrolet C/K Trucks, Blazer, Suburban equipped with the Small Block Chevy (5.0L/5.7L) engine in both 2WD and 4WD configurations.

Are header bolts and flange hardware required to be retorqued after installation?

Yes, retorque the header mounting hardware after the first few thermal heat cycles to ensure the gaskets maintain an airtight seal against the cylinder head.

The Chevrolet Heavy-Duty Caliber

Constructed specifically for the working demands of classic Chevy trucks and utility vehicles, these long tube headers deliver the structural rigidity, low-end grunt, and continuous thermal resilience required for heavy payload carrying and demanding towing conditions.