Description
Fix the "Chevy Tick" & Wake Up Your Vortec V8
Is your 1999-2006 Silverado or Sierra ticking on cold starts? The factory cast-iron manifolds are notorious for warping and snapping bolts, restricting the potential of your 4.8L, 5.3L, or 6.0L Vortec engine.
The Solution: Flashark Long Tube Headers with Y-Pipe. Eliminate the restrictive stock manifold, fix the exhaust leak permanently, and unleash +20-25 HP and massive torque across the entire 4.8L, 5.3L, and 6.0L lineup.
| Year Range | Make & Model | Engine Size |
|---|---|---|
| 1999-2006 |
Chevy Silverado 1500 (2WD Only) |
4.8L / 5.3L / 6.0L V8 |
| 1999-2006 |
GMC Sierra 1500 (2WD Only) |
4.8L / 5.3L / 6.0L V8 |
| 1999-2006 |
Chevy Avalanche 1500 (2WD Only) |
4.8L / 5.3L / 6.0L V8 |
⚠️ Important Fitment Notes:
- Transmission: If using a larger 4L80E transmission, the bellhousing ears may need trimming for clearance.
- 4WD / 4x4 Models: This kit is a direct bolt-on for 2WD models. For 4WD, the Y-Pipe often interferes with the front driveshaft and may require modification (cutting/welding) by a professional shop.
Key Features
- 100% Brand New: Never used or installed.
- High-Flow Design: Increases air flow instantly, gaining 20-25+ HP (with tune) and Torque.
- Premium Material: Made of high-quality Polished Stainless Steel for durability.
- Precision Welding: TIG welded CNC machine flanges for resistance against pressure and corrosion.
- Mandrel-Bent Tubing: Ensures smooth exhaust flow for maximum performance.
- Direct Bolt-On: Designed for easy installation with no modification needed for 2WD models.
- Complete Kit: Includes headers, Y-pipe, necessary hardware, bolts, and gaskets.
Header Specifications:
| Item | Specs |
|---|---|
| Color | Black / Silver |
| Finish | Mirror Polished |
| Inlet/Outlet | 1.83" / 2.84" |
| Connection | 2×4-1 Manifold to 3" Y-pipe |
| Craft | TIG Weld, CNC Flange |
| Install | Bolt-on |
Installation & Sound Clip
Hear the difference on a Cammed 5.3L Silverado:
📦 Packing List:
- Long Tube Headers (Pair)
- 3" Y-Pipe
- Gaskets
- Hardware
FAQ: Common Questions
Q1: Will these fit my 1999-2006 Chevy Silverado or GMC Sierra 1500?
Yes! This header kit is a direct fit for 1999, 2000, 2001, 2002, 2003, 2004, 2005, and 2006 Chevrolet Silverado and GMC Sierra 1500 models (2WD) equipped with the 4.8L, 5.3L, or 6.0L Vortec engines.
Q2: Do I need a tune after installing long tube headers?
Highly Recommended. While the truck will run without a tune, long tube headers significantly change airflow. A custom tune (like Black Bear Performance or HP Tuners) is recommended to remove the Check Engine Light (CEL), optimize fuel trim, and unlock the full +20-25 HP potential.
Q3: Does this kit include the Y-Pipe?
Yes. This is a complete package including the stainless steel long tube headers and a matching 3-inch Y-Pipe that connects directly to your factory or aftermarket cat-back exhaust system.
Q4: Will these headers fit a 4WD / 4x4 truck?
These are designed as a direct bolt-on for 2WD models. For 4WD / 4x4 models, the Y-Pipe crossover often interferes with the front driveshaft. You will likely need to modify (cut/weld) the Y-pipe to clear the driveshaft, but the headers themselves will fit the engine block perfectly.
Q5: Do these headers fit the 4.8L and 6.0L Vortec engines?
Absolutely. The 4.8L (LR4), 5.3L (LM7), and 6.0L (LQ4) engines all share the exact same LS-based exhaust port design. These headers fit all three engine sizes perfectly.
Q6: How much horsepower will I gain?
On a standard 5.3L or 6.0L engine, you can expect gains of 20-25+ Wheel Horsepower (WHP) and significant low-end torque with a proper tune. Even without a tune, the increased airflow provides noticeable throttle response improvements.
Q7: Does the kit come with gaskets and bolts?
Yes, the kit includes a set of manifold gaskets and header bolts. However, many enthusiasts recommend upgrading to OEM GM MLS (Multi-Layer Steel) gaskets for the best possible seal longevity.
Q8: Will this fix the "Chevy Tick" exhaust leak?
Yes. The infamous ticking noise is caused by the factory cast-iron manifold warping and snapping bolts. Our headers feature thick CNC-machined flanges and stainless steel construction that dissipates heat faster, solving the warping issue permanently.
Q9: Are O2 sensor extensions required?
In most cases, yes. Because long tube headers move the primary O2 sensors further downstream, you may need O2 sensor extension harnesses (usually 12" to 24") to reach the new sensor locations without stretching the factory wiring.
Q10: What is the primary tube size?
These headers feature 1-3/4" (1.75 inch) primary tubes merging into a 3-inch collector. This size is optimized for the 4.8L/5.3L/6.0L engines to maximize scavenging and mid-range torque without sacrificing top-end power.