Exhaust Headers for Chevrolet Corvette (1963-1982) 305 327 350 Engines

High-Flow Long-Tube Exhaust Headers for 1963-1982 Chevrolet Corvette (SBC C2/C3)

Replaces restrictive factory cast iron manifolds with a high-velocity long-tube design to maximize exhaust scavenging and reduce backpressure on Small Block Chevy engines.

The Stock Corvette Exhaust Bottleneck

Original equipment cast iron manifolds on C2 and C3 Corvettes were designed for space efficiency rather than gas dynamics. These "log" style manifolds force exhaust pulses from multiple cylinders into a shared chamber, creating significant turbulence and backpressure that hinders the engine's volumetric efficiency. Additionally, the heavy cast iron construction acts as a massive heat sink, retaining thermal energy long after operation, which contributes to under-hood heat soak and can lead to premature failure of spark plug wires and nearby rubber components. In high-performance SBC builds, this restriction prevents the camshaft from reaching its full potential, effectively choking the engine at mid-to-high RPM ranges.

The Engineering Solution

These full-length headers are engineered from 16-gauge T304 stainless steel, providing a significant upgrade in both durability and thermal dissipation. The 1-5/8" primaries are mandrel-bent to maintain a constant internal diameter, ensuring smooth laminar flow from the exhaust port to the collector. The 4-into-1 design culminates in a 3" collector, utilizing scavenging physics to pull spent gases out of the combustion chamber more effectively than stock. To ensure a permanent, leak-free seal, the headers feature CNC-machined 5/16" thick flanges and O-ring port seals that resist warping under extreme heat cycles. The polished finish provides a professional aesthetic while resisting the corrosion typical of mild steel alternatives.

Technical Specifications

Compatibility

• 1963-1967 Chevrolet Corvette (C2 Chassis)
• 1968-1982 Chevrolet Corvette (C3 Chassis)
• Engine Fitment: Small Block Chevy 262, 305, 327, 350, 400ci V8
• Note: May not fit specific double-hump 327 cylinder heads

The Chevrolet Muscle Standard

Designed for the classic American small block, these headers prioritize high-RPM breathability and a distinct, aggressive exhaust note. This is a critical upgrade for Corvette owners seeking to improve throttle response and horsepower while maintaining the mechanical integrity of a vintage C2 or C3 platform.