SKU: 48-34145 | UPC: 802959483374
aFe Twisted 1-3/4in 304SS Shorty Header 2020-2025 GM 2500/3500HD 6.6L V8
This aFe Power Twisted Steel short tube header upgrades exhaust flow on 2020-2025 Chevrolet Silverado 2500/3500 HD, GMC Sierra 2500/3500 HD, and Express vans with 6.6L V8 L8T engines. Mandrel-bent 1-3/4-inch 304 stainless steel tubing delivers a powerful exhaust note while releasing horsepower and torque. Direct bolt-on design ensures easy installation with no cutting or modifications needed.
Key Features
- 1-3/4″ Mandrel-Bent 304 Stainless Steel Tubing: Provides maximum strength, corrosion resistance, and durability for long-lasting performance on heavy-duty trucks.
- Optimized Tube Lengths: Applies pulse control technology to enhance exhaust scavenging, improving flow, throttle response, and overall engine efficiency.
- Heavy Duty Laser Cut Flanges: Factory-style design creates a secure, leak-free connection to the cylinder heads and exhaust system.
- 100% MIG-Welded Construction: Delivers race-level strength to withstand high heat and pressure in demanding diesel and gas applications.
- Retains Factory Sensors: Keeps all OEM O2 and emissions sensors in place for plug-and-play compatibility and no check engine lights.
Product Notes
- Collector tube size measures 3 inches for smooth merging of exhaust pulses.
- Natural stainless finish resists rust and maintains appearance over time.
- Designed and manufactured in Corona, California for precise fitment.
Installation Notes
- Professional installation recommended.
- Bolts directly to factory cylinder heads and downpipes with included gaskets.
- Compatible with stock catalytic converters and full exhaust systems.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2025 | Chevrolet | Silverado 2500 HD | High Country, LT, LTZ, WT |
| 2020-2025 | Chevrolet | Silverado 3500 HD | High Country, LTZ, WT |
| 2020-2025 | GMC | Sierra 2500 HD | AT4, Base, Denali, Pro, SLT |
| 2020-2025 | GMC | Sierra 3500 HD | AT4, Base, Denali, Pro, SLE, SLT |
| 2021-2025 | Chevrolet | Express 2500 | Base, LS, LT |
| 2021-2025 | Chevrolet | Express 3500 | Base, LS, LT |
| 2021-2021 | Chevrolet | Express 4500 | All |
Why Choose aFe POWER?
- Over 20 years of engineering exhaust systems for GM trucks and SUVs.
- Computer-aided design ensures exact factory-level fitment every time.
- High-flow headers proven on dyno for real-world power increases.
Frequently Asked Questions
- Q: Will this header fit my 2024 Silverado 2500 HD 6.6L gas?
A: Yes, confirmed fitment for all 2020-2025 Silverado 2500/3500 HD and Sierra models with L8T 6.6L V8, including High Country and Denali trims. - Q: What material is used and does it rust?
A: Full 304 stainless steel construction with natural finish resists corrosion and high exhaust temperatures for years of service. - Q: What is the warranty and install time?
A: Backed by aFe Power’s limited lifetime warranty. Bolt-on install takes 2-4 hours with basic tools, no welding required.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Securely boxed with protective padding, dimensions 41 x 17 x 13 inches
- Weight: 25 lbs
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