1999-2005 Chevy Silverado GMC Sierra 1500 4.8L 5.3L 6.0L V8 Exhaust Headers & Catless Y-Pipe Kit

SKU: XKV11053
Availability : In Stock Pre order Out of stock
$384.10 $292.22 SAVE $91.88
Fitment & Specs
1999-2005 Silverado/Sierra 1500 plus selected 2000-2005 GMT800 SUV applications; verify exact year and engine.
1.875 in x 8 Manifold Ports Inlet · 2.500 in OD Outlet
T304 Stainless Steel · Professional Installation Recommended
Before You Buy: Off-road/racing use only · Professional install recommended
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Description
Chevy GMC GMT800 Exhaust Upgrade

Exhaust Headers & Catless Y-Pipe for GMT800 V8 Applications

T304 stainless steel exhaust headers with a matched catless Y-pipe for the listed Chevrolet and GMC GMT800 1500-series truck and SUV applications. Designed around compatible 4.8L, 5.3L and 6.0L V8 applications, with 2.5-inch main piping and application-specific exhaust routing.

Product Type Headers & Catless Y-Pipe
Material T304 Stainless Steel
Main Piping 2.5 Inch

Key Details

Header & Catless Y-Pipe Assembly

  • Application-specific exhaust header configuration
  • Matched catless Y-pipe included
  • 1.875-inch x 8 manifold-port reference
  • 2.500-inch outlet outer diameter
  • 2.500-inch main piping diameter

Stainless Steel Construction

  • T304 stainless steel construction
  • Computerized mandrel-bent tubing
  • CNC-machined flanges
  • TIG and MIG welded construction
  • Designed for smooth exhaust routing and reduced restriction
Vehicle Fitment

Confirm Your Vehicle, Year & Engine

Vehicle Year Engine
Chevrolet Silverado 1500 1999-2005 4.8L / 5.3L / 6.0L V8
GMC Sierra 1500 1999-2005 4.8L / 5.3L / 6.0L V8
Chevrolet Avalanche 1500 2002-2005 5.3L V8
Chevrolet Tahoe 2000-2004 4.8L / 5.3L V8
Chevrolet Suburban 1500 2000-2004 5.3L V8
GMC Yukon 2001-2004 4.8L / 5.3L / 6.0L V8
GMC Yukon XL 1500 2000-2004 5.3L / 6.0L V8
Fitment Note: Fitment is limited to the vehicle, model-year and engine combinations listed above. This product does not fit the 2003 GMC Yukon SLT Sport Utility 4-Door 5.3L application. Verify the exact vehicle, engine and existing exhaust configuration before ordering.

Installation & Fitment Notes

Before Installation

  • Confirm the exact vehicle, model year and engine size.
  • Verify the existing exhaust layout and downstream connection.
  • Confirm O2 sensor locations and sensor routing before installation.
  • Check Y-pipe routing and surrounding chassis clearance before final assembly.
  • Compare the supplied components with the existing exhaust before installation.

Installation Notes

  • Professional installation is highly recommended.
  • Installation instructions are not included.
  • Exhaust alignment and connection requirements may vary with the existing exhaust configuration.
  • Final fitment should be confirmed before tightening or modifying any supplied component.

Before You Buy

  • Fits only the listed Chevrolet and GMC GMT800 1500-series vehicle, model-year and engine combinations.
  • This kit includes a catless Y-pipe and is intended for off-road, racing or closed-course use where permitted.
  • Not compatible with the 2003 GMC Yukon SLT Sport Utility 4-Door 5.3L application.
  • Verify vehicle, year, engine, O2 sensor layout, Y-pipe routing, chassis clearance and downstream exhaust connection before ordering.
Shipping & Return

SHIPPING & DELIVERY
Fast Processing & Reliable Transit

  • Processing: Orders are processed and shipped from the nearest available warehouse within 1 business day after payment.
  • Delivery: Estimated delivery time is approximately 3–4 business days after shipment.
  • Shipping - Free shipping on all orders within the contiguous 48 U.S. states.

RETURNS & EXCHANGES
30-Day Hassle-Free Policy

  • Return Window: We offer a 30-day return policy from the date of delivery.
  • Item Condition: Returned items should be unused, uninstalled, and in their original packaging when possible.
  • Return Process: To initiate a return or exchange, please contact our customer service team first to receive authorization and instructions.

WARRANTY
2-Year Limited Replacement Warranty

  • Duration: All products are backed by a 2-year limited warranty.
  • Coverage: This warranty covers manufacturing defects and product failures under normal use, and provides a replacement for qualified cases (repairs are not performed).

CUSTOMER SUPPORT
We’re Here to Help – Contact Us First

  • Priority Contact: For any order-related issues—including returns, warranty claims, or general inquiries—please contact us first before taking further action. We are committed to resolving your concern promptly.
  • Feedback Notice: If you are unsatisfied, we kindly ask that you allow us an opportunity to address the issue before leaving neutral or negative feedback.
  • Email Support: You can reach us at support@XKVracing.com.

What Does an Exhaust Header Actually Do?

The exhaust header is the first section of the exhaust system and mounts directly to the engine. Its role is to collect exhaust gases from each cylinder and route them into the rest of the exhaust system.

Compared to many factory manifolds, header designs often focus on smoother internal flow and more uniform exhaust routing before gases move downstream.

What You May Notice After Installation

Smoother exhaust flow as engine speed increases

More consistent engine behavior across the RPM range

Improved exhaust routing when paired with other intake or exhaust components

Changes in exhaust tone, depending on system configuration

When This Type of Upgrade Is Typically Considered

Addressing airflow limitations in the factory exhaust manifold

Planning coordinated intake or exhaust system updates

Replacing aging or restrictive original components

Build a balanced, performance-focused setup

Factory Manifold vs. Performance Header

Factory Exhaust Manifold

Designed to meet packaging, cost, and emissions requirements
Prioritizes durability and compliance across broad use cases

Performance Exhaust Header

Designed with exhaust flow characteristics in mind
Built for higher exhaust temperatures and specific vehicle platforms
Commonly used as part of an exhaust system configuration

FAST SHIPPING

Ships within 1 business day after payment
3–4 business day delivery

Secure and Reliable Checkout

Secure checkout with major payment options

LOCAL WAREHOUSE

Orders ship from U.S. warehouses when available

Easy Returns and Exchanges

30-day returns for eligible unused items

Parts Warranty

Warranty support for qualified manufacturing defects

Important Notice

Products on this site are intended for off-road, racing, or closed-course use where emissions laws apply. They are not represented as street legal, emissions-compliant, or legal for use on public roads unless explicitly stated.

Some products may remove, replace, relocate, disable, or alter emissions-related components, including but not limited to catalytic converters, EGR, DPF, SCR, DOC, O2 sensors, or related factory systems. Compatible tuning, calibration, or supporting modifications may be required to avoid engine codes or drivability issues.

Professional installation is recommended. Buyers are responsible for verifying product compatibility, local regulations, emissions requirements, and any required tuning or supporting modifications before purchase and installation.

Performance gains, sound changes, airflow improvements, temperature changes, fuel economy changes, fitment, and drivability results may vary. No specific performance gains are guaranteed.

Frequently Asked Questions

What do exhaust headers do? +

Exhaust headers help route exhaust gases away from the engine through individual tubes and collector-style routing. Actual results depend on the vehicle, engine condition, exhaust system, installation quality, and supporting components.

What's the difference between headers and factory manifolds? +

Factory manifolds are typically designed around packaging, durability, emissions requirements, and production cost. Headers or manifold-related exhaust upgrades may use different tube routing, flange designs, or connection layouts depending on the application.

Will headers increase horsepower? +

Headers may support improved exhaust flow where the product is compatible, but horsepower and torque changes are not guaranteed. Results vary by engine setup, tuning, exhaust configuration, vehicle condition, installation, and supporting modifications.

Do headers make the vehicle louder? +

Headers and related exhaust parts can change exhaust tone and may increase sound depending on the rest of the exhaust system. Final sound level depends on the engine, mufflers, catalytic converters, pipe routing, and complete exhaust setup.

Do I need tuning after installing headers? +

Tuning requirements depend on the vehicle, engine management system, O2 sensor setup, emissions equipment, and supporting modifications. Some installations may not require tuning, while modified builds may require professional inspection, calibration, or tuning to support proper drivability.

Are header products street legal? +

Header and exhaust products may be intended for off-road or racing use where emissions laws apply. They are not represented as street legal, emissions-compliant, or CARB-compliant for public road use unless a valid exemption is explicitly stated. Always check local regulations before purchase and installation.

Can I use headers with a stock exhaust system? +

Compatibility with a stock exhaust system depends on the vehicle and existing exhaust configuration. Some vehicles may require additional hardware, gaskets, connectors, adjustment, or fabrication to complete installation.

Are headers hard to install? +

Installation difficulty varies by vehicle. Tight engine bays, old hardware, rust, engine swaps, modified exhaust systems, sensor placement, and clearance around surrounding components can increase installation complexity. Professional installation is recommended.

Will headers affect reliability? +

Reliability depends on fitment accuracy, installation quality, vehicle condition, heat management, gasket sealing, fastener condition, sensor placement, and supporting components. Proper inspection and installation are important.