4.8L 5.3L LS 1979-2004 Ford Mustang/Fox Body Mustang Swap Stainless Header Exhaust

SKU: XKV11068
Availability : In Stock Pre order Out of stock
$324.41 $215.88 SAVE $108.53
Fitment & Specs
Fits selected 1979–2004 Ford Mustang / Fox Body Mustang LS swap applications with compatible GM V8 engines, including 4.8L, 5.3L, 5.7L, 6.0L and 6.2L setups. Verify chassis, engine swap configuration, steering / suspension clearance, and exhaust collector compatibility before purchase.
Polished 304 Stainless Steel · Mustang LS Swap Headers
Before You Buy: Off-road/racing use only · Professional install recommended · Tuning may be required
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Description

This stainless steel LS swap header set is designed for listed 1979–2004 Ford Mustang applications using compatible GM LS-series V8 engine swap setups. It is intended for LS swap builds where the engine, mounts, K-member, steering shaft, transmission, collector connection, and exhaust layout are compatible with the header design.

Built with full 1-7/8" primaries, 3" collectors, merge-spike style collectors, CNC-machined flanges, graphite manifold gaskets, and polished 304 stainless steel construction as listed, this header set is designed for compatible Mustang LS swap exhaust routing. Final fitment, clearance, exhaust sealing, sound, drivability, and performance results may vary depending on the vehicle chassis, swap components, engine position, transmission, steering setup, downstream exhaust, installation quality, and supporting parts.

Product Overview

This product is an LS swap exhaust header set for compatible Ford Mustang applications. It is not a factory engine replacement manifold, full exhaust system, universal header kit, or guaranteed-fit solution for every Mustang / LS swap combination. Please verify your exact chassis, LS engine, swap mount setup, K-member, transmission, steering shaft clearance, collector connection, and exhaust layout before purchase.

Key Details

  • Fitment: Listed 1979–2004 Ford Mustang LS swap applications
  • Product Type: LS Swap Exhaust Headers
  • Engine Family: GM LS-series V8 engines as listed, including 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L applications where compatible
  • Material / Finish: Polished 304 stainless steel as listed
  • Primary Size: Full 1-7/8" primaries as listed
  • Collector Size: 3" collector as listed
  • Design Features: Mandrel-bent tubing, merge spikes, and collector spikes as listed
  • Flanges: CNC-machined flanges as listed
  • Gaskets: Standard graphite manifold gaskets as listed
  • Installation: Professional installation strongly recommended
  • Instruction: No installation instructions included
  • Use Case: Off-road, racing, or closed-course use where emissions laws apply

Fitment

Please use the table below to quickly confirm the main vehicle applications listed for this LS swap header set. Before ordering, verify your exact Mustang chassis/body style, LS engine, swap mounts, K-member, steering shaft clearance, transmission setup, collector connection, and downstream exhaust layout.

Vehicle Name Year Engine / Swap Notes
Ford Mustang Fox Body 1979–1993 GM LS-Series V8 Swap Verify LS engine, swap mounts, K-member, steering shaft clearance, collector connection, and exhaust layout
Ford Mustang SN95 / New Edge 1994–2004 GM LS-Series V8 Swap Verify chassis setup, LS swap components, transmission, steering clearance, and exhaust layout
Fitment Note: This table is based on the fitment information currently listed for this product. This is an LS swap header set, not a replacement header for factory Ford Mustang engines. Fitment may vary depending on chassis generation, engine position, swap mounts, K-member, transmission, steering shaft, starter clearance, collector connection, and downstream exhaust configuration. Please confirm your complete swap setup before purchase.

Package Includes

  • LS swap exhaust header components as shown
  • Header flanges and 3" collector sections as listed
  • Standard graphite manifold gaskets as listed
  • Hardware, bolts, or additional accessories included only if shown or listed

Please review the product photos and listing details before installation. Confirm all included components, gaskets, flanges, fasteners, and collector connection requirements against the received package before beginning installation.

Installation Notes

  • Professional installation is strongly recommended.
  • No installation instructions are included.
  • Test fit both header sides before final tightening.
  • Verify clearance around the steering shaft, K-member, spark plugs, plug wires, engine mounts, transmission, starter, firewall, frame, and surrounding engine bay components.
  • LS swap vehicles may require additional parts, adjustment, fabrication, compatible mounts, or exhaust work depending on the build.
  • Verify 3" collector connection compatibility with your downstream exhaust setup before installation.
  • Inspect all flange surfaces, gaskets, fasteners, and collector connections before use.
  • Recheck fasteners and connections after initial heat cycles where appropriate.

Before You Buy

  • This product is intended for listed Ford Mustang LS swap applications only.
  • This is an LS swap header set, not a factory-engine replacement manifold, complete exhaust system, universal header kit, or guaranteed-fit solution for every swap combination.
  • Please verify LS engine compatibility, chassis generation, swap mount setup, K-member, transmission, steering shaft clearance, collector connection, and exhaust layout before purchase.
  • Additional fabrication, exhaust work, wiring clearance, plug wire routing, heat management, or supporting components may be required depending on the vehicle build.
  • This product may alter the factory exhaust or emissions-related configuration depending on the vehicle setup.
  • This product is intended for off-road, racing, or closed-course use where emissions laws apply.
  • This product is not represented as street legal, emissions-compliant, or CARB-compliant unless explicitly stated.
  • Performance gains, sound changes, exhaust flow changes, fitment, clearance, and drivability results are not guaranteed and may vary by setup.
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.