The D3351 Long Tube Header is engineered specifically for 1975-1981 GM F-Body Camaro and Firebird chassis when performing an GM LS-series engine swap. With 1.875 in. mandrel-bent primary tubes and a 3 in. collector, the header maximizes exhaust flow, reduces backpressure and enhances high-RPM power and torque. Ceramic-coated to resist heat and corrosion, this header set is built for performance, durability, and long-term reliability when paired with compatible LS swap components.

Doug's Headers D3351 GM LS Engine Swap Metallic Ceramic Coat Long Tube Headers Features:

• 1.875 in. mandrel-bent primaries for improved exhaust scavenging
• 3 in. collector for maximum flow and reduced back-pressure
• Ceramic-coated steel construction for heat resistance and corrosion protection
• Precision-formed long-tube design optimized for LS-swapped 1975-1981 Camaro/Firebird F-Body chassis
• Includes necessary gaskets and mounting hardware for installation
• Pre-polished tubing to remove scratches before coating; improves finish and longevity
• Designed to work with Doug’s LS swap motor & transmission mounts for proper fitment and clearance

Doug's Headers D3351 GM LS Engine Swap Metallic Ceramic Coat Long Tube Headers Notes:

• Fitment requires GM LS engine swap in 1975-1981 Camaro or Firebird F-Body chassis; not for stock big-block manifolds.
• May need appropriate exhaust components (mid-pipe, mufflers, flanges) when installing full system.
• Ensure clearance for steering, suspension and frame rails; long tubes may require adjustment or custom mounts depending on setup.

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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