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K2 Industries & OUR OWN FAQ's
1999-2004 Ford F-150 Lightning 5.4L Header with Downpipe Stainless Steel
SKU: K2-4854-FORD-006-EC
Sale price
$439.99 USD
Regular price
$530.00 USD
Shipping calculated at checkout.
1999-2004 Ford F-150 Lightning 5.4L Header with Downpipe Stainless Steel
Stainless steel header and downpipe assembly designed for the 5.4L Lightning engine. Built from corrosion-resistant stainless material to handle high heat and extend component life. Flows exhaust gases more efficiently than restrictive factory routing.
✓ Stainless Steel Construction ✓ In-House Quality Check ✓ Ships from FL Warehouse
Key Features
- Stainless Steel Material - Resists rust and thermal degradation under sustained high-temperature operation.
- Header and Downpipe Integration - Single assembly eliminates potential leak points between separate components.
- 5.4L Engine Specific - Engineered for proper fitment and flow characteristics on this displacement.
Specs
- Material: Stainless Steel
- Configuration: Header with integrated downpipe
- Engine: 5.4L
- Condition: New
Whats Included
- Header and downpipe assembly
Frequently Asked Questions
Will this bolt directly to the factory exhaust manifold location?
This header is designed to replace the factory cast manifold at the cylinder head. Verify bolt hole alignment and O2 sensor bung location before final installation—test-fit the assembly on the engine first.
Do I need to prep or coat the stainless steel before installation?
Stainless steel doesn't require primer or paint. Install it as-is. High-temperature exhaust gases will naturally patina the outer surface over time.
What's the warranty on this header?
Return or warranty details aren't specified in the product data—reach out to ModSupply directly with your order number for coverage information.
K2 Industries & OUR OWN FAQ's
How do I check fitment?
Check the listing for your year, make, model, trim and engine. Body style, build date and factory options can matter. If the listing is unclear, send FI Performance your vehicle details and the product link or SKU before ordering.
What comes with this part?
Check the product description for quantities, hardware and accessories. Photos may show the part installed with other components. Ask us if you need to confirm whether a part is sold individually, as a pair or as a kit.
Will I need extra parts or modifications?
That depends on the part and your setup. Check for adapters, wiring, coding, tuning, trimming or additional hardware before booking installation. If you already have aftermarket parts, tell us what’s installed.
What should I check for headlights or tail lights?
Match your factory lighting type, connector and body style. Halogen, HID and LED assemblies can differ even on the same model. Check pre-facelift versus facelift fitment and features such as adaptive lights or leveling.
Should I have a shop install it?
We recommend a qualified installer for wiring, engine, brake and suspension work. Inspect the part and confirm fitment before cutting, drilling, painting or modifying anything.
When will my order ship?
Availability and lead time vary by item. If you’re working around a shop appointment or event, contact FI Performance for a current estimate before ordering.
How do returns and warranty claims work?
Contact FI Performance with your order number before sending anything back. Eligibility depends on the item, its condition and the applicable policy. If there’s damage or a defect, keep the packaging and send photos of the part, label and issue.
Is this part intended for street use?
Check the listing for any use restrictions and confirm the requirements where you drive. If you need a specific approval or certification, ask us to verify it for the exact part number before ordering.
Why should I buy from FI Performance?
FI Performance is a USA-based team of automotive enthusiasts focused on quality, reliability and helpful support. We work closely with manufacturers and can help guide your build from product selection through order support.
How can I contact customer support?
Reach FI Performance by live chat, email or phone for product questions, order help and automotive guidance.
What parts are best for my car and goals?
Tell FI Performance your vehicle, intended use and goals. We can help narrow down the right parts and put together a practical modification plan for your build.
Do you offer financing options?
Eligible financing options are shown at checkout. Select the available financing method during checkout to review payment terms and monthly-payment options.
How do I track my order?
When your order ships, FI Performance sends tracking information by email so you can follow delivery progress and view the estimated arrival date.
What payment methods do you accept?
FI Performance accepts major credit cards, PayPal and any financing options displayed at checkout.
How do I know if I have factory Xenon lighting?
Factory Xenon lights commonly have a blue-tinted output and a short warm-up period. Check your owner's manual or send FI Performance your vehicle details so we can help confirm your factory lighting type.
What is the difference between Halogen, HID and LED lighting?
Halogen lighting is the traditional, affordable option. HID lighting typically provides greater brightness, while LED lighting is energy-efficient and long-lasting. FI Performance can help you select the correct option for your vehicle.
How do I prevent lighting condensation?
Condensation can occur as temperatures change. Lighting assemblies are designed to minimize it; contact FI Performance for guidance if you see persistent condensation or have product-specific questions.
How do I check fitment?
Check the listing for your year, make, model, trim and engine. Body style, build date and factory options can matter. If the listing is unclear, send FI Performance your vehicle details and the product link or SKU before ordering.
What comes with this part?
Check the product description for quantities, hardware and accessories. Photos may show the part installed with other components. Ask us if you need to confirm whether a part is sold individually, as a pair or as a kit.
Will I need extra parts or modifications?
That depends on the part and your setup. Check for adapters, wiring, coding, tuning, trimming or additional hardware before booking installation. If you already have aftermarket parts, tell us what’s installed.
What should I check for headlights or tail lights?
Match your factory lighting type, connector and body style. Halogen, HID and LED assemblies can differ even on the same model. Check pre-facelift versus facelift fitment and features such as adaptive lights or leveling.
Should I have a shop install it?
We recommend a qualified installer for wiring, engine, brake and suspension work. Inspect the part and confirm fitment before cutting, drilling, painting or modifying anything.
When will my order ship?
Availability and lead time vary by item. If you’re working around a shop appointment or event, contact FI Performance for a current estimate before ordering.
How do returns and warranty claims work?
Contact FI Performance with your order number before sending anything back. Eligibility depends on the item, its condition and the applicable policy. If there’s damage or a defect, keep the packaging and send photos of the part, label and issue.
Is this part intended for street use?
Check the listing for any use restrictions and confirm the requirements where you drive. If you need a specific approval or certification, ask us to verify it for the exact part number before ordering.
Why should I buy from FI Performance?
FI Performance is a USA-based team of automotive enthusiasts focused on quality, reliability and helpful support. We work closely with manufacturers and can help guide your build from product selection through order support.
How can I contact customer support?
Reach FI Performance by live chat, email or phone for product questions, order help and automotive guidance.
What parts are best for my car and goals?
Tell FI Performance your vehicle, intended use and goals. We can help narrow down the right parts and put together a practical modification plan for your build.
Do you offer financing options?
Eligible financing options are shown at checkout. Select the available financing method during checkout to review payment terms and monthly-payment options.
How do I track my order?
When your order ships, FI Performance sends tracking information by email so you can follow delivery progress and view the estimated arrival date.
What payment methods do you accept?
FI Performance accepts major credit cards, PayPal and any financing options displayed at checkout.
How do I know if I have factory Xenon lighting?
Factory Xenon lights commonly have a blue-tinted output and a short warm-up period. Check your owner's manual or send FI Performance your vehicle details so we can help confirm your factory lighting type.
What is the difference between Halogen, HID and LED lighting?
Halogen lighting is the traditional, affordable option. HID lighting typically provides greater brightness, while LED lighting is energy-efficient and long-lasting. FI Performance can help you select the correct option for your vehicle.
How do I prevent lighting condensation?
Condensation can occur as temperatures change. Lighting assemblies are designed to minimize it; contact FI Performance for guidance if you see persistent condensation or have product-specific questions.
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