Best 2-Inch Primary LS Headers for Classic Chevy and GM Trucks
Answering the need for reliable power gains and clearance, these 2-inch primary LS headers are designed for LS swaps in classic GM trucks and muscle cars. This guide highlights options best for square-body C10s, S-series swaps, and multi-engine projects. Each product is chosen for its primary size, fitment notes, and swap suitability, helping you pick the right header for a clean install and solid sealing.
Buyer profile quick reference: ideal for DIY builders doing LS swaps in 1960–1986 Chevy C10/C20/C30 and related trucks, or universal swap applications where 1-5/8″ to 2-1/2″ primary configurations are needed. The table below summarizes the selected options.
| Product | Best For | Primary Size (Inlet) | Notes |
|---|---|---|---|
| LS Swap Header Replacement for 1960-1986 Chevy C10 Camaro GMC Chevrolet Silverado LS1 LS2 LS3 LS6 LS9 V8 4.8L 5.3L 5.7L 6.0L 6.2L | Classic C10/Chevy swaps needing 1-5/8″ primaries with 2-1/2″ collectors | 1 5/8″ | T304 stainless steel; silver; shorty length |
| Stainless Steel Headers, Shorty Style for LS Swaps | Universal swaps across multiple platform cages and square/body frames | Not specified (shorty) | Fits numerous LS swap apps; compatible with LS1/LS2/LS3/LS6/LS7 family |
| Conversion Swap Headers C10 LS LSX FOR Chevy GMC Chevrolet Camaro Caprice Silverado | Specific C10/LS swaps with angled plug clearances | Not specified | Angled spark plug boots required; professionally TIG welded |
| LISMWKS Exhaust Header for GMC C10 LS Engines | Older GM pickup swaps needing robust stainless build | 1-5/8″ inlet, 2-1/2″ collector | 16 GA 304 stainless; durable; LS1/LS2/LS3/LS6/LS7 capable |
| LS Swap Shorty Exhaust Headers with Upgraded MLS Gaskets | LS swaps requiring leak-free gasket upgrade and compact fit | 2.5″ collector | MLS and copper gasket upgrade; swap-only application |
LS Swap Header Replacement for 1960-1986 Chevy C10…
Best for classic square-body C10s and early trucks that originally used non-LS exhausts but need a shorty header with 1-5/8″ primaries and a 2-1/2″ collector. The 1-5/8″ primary sizing helps fitment around steering and frame rails while the 2-1/2″ collector supports decent flow for LS builds. Suitable for LS1/LS2/LS3 era engines with a compact installation profile.
Who it’s for: builders prioritizing a compact, corrosion-resistant option for 1960–1986 GM trucks and Camaros. Caution: verify clearance with steering shafts and crossmembers to avoid contact in tight engine bays.
Stainless Steel Shorty Headers for LS Swaps
Best for broad swap applicability where space is tight and a universal LS header is needed. These headers fit a wide range of swap projects, including 73-87 Square Body C10, 67-72 C10, K5 Blazer, Suburban, and S10 pickups, with LS engines up to 6.2L. They’re designed for LS1, LS2, LS3, LS6, LS7 family engines and do not fit non-LS engines.
Who it’s for: builders needing a flexible, nearly universal option for various GM swap vehicles. Limitation: not designed for LT engines or factory LS-equipped vehicles.
Conversion Swap Headers C10 LS LSX For Chevy/GMC
Best for dedicated C10 and LSX swaps where angled spark plug boots are needed for clearance. They’re designed for LS engines with swap-specific requirements and feature professionally TIG-welded joints. This option emphasizes swap compatibility and proper fitment in constrained engine bays.
Who it’s for: users needing angled boot clearance in tight C10 swaps. Caution: verify engine family (LS family only) and boot angle compatibility with your LS variant.
LISMWKS Exhaust Header For LS Swaps
Best for general LS swap builds in older GM models, including 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L engines. The 1-5/8″ inlet and 2-1/2″ collector provide a balanced path for flow and a robust stainless build. The 16 GA 304 stainless steel adds durability and corrosion resistance for varied climates.
Who it’s for: versatile swap projects that need a durable stainless option with a clear primary-to-collector ratio. Caution: fitment may vary depending on specific chassis and steering configurations.
LS Swap Shorty Headers With MLS Gasket Upgrade
Best for swaps requiring a durable seal and compact design. The header includes MLS steel gaskets and copper collector gaskets to improve sealing under heat cycles. It is a swap-only application and features a compact shorty layout for tight engine bays in S10, C10, and similar frames.
Who it’s for: builders prioritizing a leak-resistant gasket kit and a compact header. Limitation: not a direct bolt-on for factory trucks with LS engines in place; verify engine compatibility before purchase.
Buying Guide
What should you consider when choosing 2-inch primary LS headers?
- Fitment and vehicle type: Is the header designed for your specific model (C10/C20/C30, S10, Suburban) or is it a universal swap header?
- Primary and collector sizes: Does the 1-5/8″ to 2-1/2″ range align with your engine and exhaust system goals?
- Material and durability: Is 304 stainless steel used for corrosion resistance and longevity?
- Gasket options: Are MLS or copper gaskets included or recommended for improved sealing?
- Clearance and fitment: Will the design work with steering shafts, frame rails, and crossmembers in your chassis?
- Swap compatibility: Is the header intended for LS swaps only and does it support LS1/LS2/LS3/LS6/LS7 family engines?
- Installation considerations: Does the product require professional welding or specific boot clearance for spark plugs?
FAQ
- Q: Do these headers fit all LS engines?
A: Most listed options target LS1/LS2/LS3/LS6/LS7 families; verify engine compatibility before purchase. - Q: What is the benefit of a 2-inch primary header?
A: A 2-inch primary can improve exhaust flow and potentially power in certain swap configurations, especially when paired with a 2-1/2 inch collector. - Q: Are these headers universal or vehicle-specific?
A: Some are universal swap headers with broad fitment; others are designed for specific models like C10/C20/C30 trucks. - Q: Do these headers require gasket upgrades?
A: Several options include MLS or copper gaskets for improved sealing; check product details. - Q: Is professional installation recommended?
A: For weld-required or boot clearance issues, professional installation is advised to ensure proper fit and seal. - Q: Can I use these headers on factory LS vehicles?
A: These headers are typically swap-oriented and may not fit vehicles that originally came with LS engines.