Headers for LS In 67-98 1/2 Ton Truck 1.875in

HEDMAN Headers for LS In 67-98 1/2 Ton Truck with 1.875-inch primary tubes deliver a complete long-tube header solution engineered for Gen III/IV LS engine swaps into classic Chevrolet and GMC full-size trucks and SUVs. This stainless steel, naturally finished pair (part number 45697) provides a direct bolt-in alternative to OEM cast iron manifolds while maintaining stock fitment and clearance in vehicles spanning from 1967 through 1998 production years.

The 1.875-inch primary tube diameter represents an optimal compromise for street-driven LS conversions, balancing mid-range torque response with scavenging efficiency at moderate RPM levels. The 3-inch collector consolidates exhaust gases while minimizing backpressure, allowing the engine to breathe more freely than factory manifolds without excessive peak power demands that require race-spec tuning. Stainless steel construction resists corrosion and thermal cycling better than standard mild steel headers, extending service life in harsh climates and extended storage periods. The natural (unpainted) finish requires seasoning during initial operation as the steel develops a protective oxide patina.

These headers are purpose-built for LS engine conversions into first through third-generation C-series trucks (C10, C20, Blazer, Suburban) and full-size SUVs that retain original or near-original engine bay dimensions. The 1967–1998 compatibility window encompasses both carbureted and fuel-injected platforms, though buyers performing LS swaps must verify exhaust routing and collector clearance with their specific vehicle body style and frame configuration. Comprehensive installation requires exhaust piping downstream of the collector, gaskets, and fasteners not included in this header pair.

HEDMAN is recognized within the LS swap community for manufacturing long-tube headers that achieve consistent fitment across multiple chassis platforms. These stainless steel units represent a mid-tier option that prioritizes durability and stock clearance over maximum power output, making them suitable for restorations and modernized trucks where reliability and longevity matter as much as performance gains.