About This Product
1 3/4" Longtube Headers
These Speed Engineering 1 3/4" longtube headers are designed for 1999-2006 GM Silverado, Sierra, and SUV applications, delivering proven performance gains, excellent fitment, and high-quality construction at an affordable price point. Built from durable 304 stainless steel, these headers are a solid upgrade for LS-based street and performance builds.
Part Number
- Speed Engineering: SPD-7513
Product Features
- Full 1 3/4" mandrel-bent primary tubes
- 3" collector for improved exhaust flow
- 304 stainless steel construction
- TIG welded for strength and durability
- CNC machined flanges for precise fitment
- Merge spikes for improved exhaust scavenging
- Race version with no AIR or EGR provisions
- Includes standard graphite manifold gaskets
Engine Compatibility
- Fits GM LS-based V8 engines
- 4.8L
- 5.3L
- 6.0L
Vehicle Compatibility
- 1999-2006 Chevrolet Silverado 2WD & 4WD
- 1999-2006 GMC Sierra 2WD & 4WD
- 1999-2006 Chevrolet Tahoe 2WD & 4WD
- 1999-2006 GMC Yukon 2WD & 4WD
- 2002-2006 Cadillac Escalade 2WD & 4WD
- 2002-2006 Cadillac EXT 2WD & 4WD
- 2002-2006 Chevrolet Avalanche 2WD & 4WD
Common Applications
- Street performance builds
- Camshaft upgrade setups such as Chopacabra, Truck Norris, etc.
- DOD/AFM delete builds
- Full exhaust system upgrades
Performance Benefits
- Gain of 25+ rear wheel horsepower
- Improved exhaust flow and engine efficiency
- Better throttle response
- Enhanced exhaust sound
Important Fitment Notes
These headers are designed for V8 applications only and some combinations may require minor modifications for proper installation.
- Designed for V8 applications only
- Some 4L80E transmissions may require minor bellhousing clearance
- Some 2500 models may have clearance issues due to chassis differences
- Most 6.0 applications with 2-into-1 exhaust will require modification
For off-road and competition use only. Not legal for use on public roads or emissions-controlled vehicles.
Installation Information ›
- Professional installation recommended
- Tuning required for optimal performance
- Check clearance before final install
Note:
These headers are a proven budget-friendly performance upgrade for GM trucks and SUVs. When paired with proper tuning, they deliver significant gains in power, sound, and overall drivability.
