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Kooks Headers 1400H440 1-7/8" Long Tube Header & H.O. GREEN Cat Connection Kit

(2020-2026 Ford F-250 Super Duty; 2020-2026 Ford F-350 Super Duty)

Manufacturer

Picture for manufacturer Kooks Headers

Part Number

1400H440
8 reviews
Sale Price

$3,121.26

Estimated ship date Saturday, November 28

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Kooks Headers 1400H440 is a complete long tube header and high-output GREEN catalytic converter connection kit engineered specifically for 2020-2022 Ford F250/F350 Super Duty trucks equipped with the 7.3L gasoline V8 engine. This premium exhaust system features 1-7/8" primary tubes designed to maximize exhaust flow and unlock significant horsepower and torque gains from Ford's Godzilla V8 platform.

Key Features:

  • 1-7/8" diameter primary tubes optimized for performance and backpressure reduction
  • Includes H.O. GREEN high-flow catalytic converters for emissions compliance
  • Constructed from T304 aircraft-quality stainless steel for superior durability and corrosion resistance
  • Precision mandrel-bent tubing maintains consistent diameter for maximum flow
  • CNC-machined flanges ensure leak-free sealing and proper fitment
  • Dyno-tested and race-proven design delivers measurable power gains
  • Manufactured in the USA with exceptional craftsmanship
  • Backed by Kooks' limited lifetime warranty to the original purchaser

This complete header and catalytic converter kit provides a direct bolt-on upgrade for F250/F350 Super Duty owners looking to extract maximum performance from their 7.3L engine while maintaining 50-state legal emissions compliance. The high-output GREEN catalytic converters flow significantly better than restrictive factory units while still meeting emissions standards.

Products specifications

Fits

2020-2026 Ford F-250 Super Duty; 2020-2026 Ford F-350 Super Duty

Additional Parts Required

No

Head Style

Long-Tube

Prop 65

WARNING: This product can expose you to chemicals including Chromium and Nickel, which are known to the State of California to cause cancer, birth defects or reproductive harm. For more information go to www.p65warnings.ca.gov

FLANGE Thickness

0.375 In.

Coated Finish

Natural

Tube Wall Thickness

16 Gauge

Application

Automotive

Catalytic Converter Quantity

2

Catalytic Converter(s) Included

Yes

Clamps Included

Yes

Collector Attachment

Stock flange

Collector Attachment

Slip fit

Collector Diameter

3.000 in.

Color

Stainless Steel

Cylinder Head Port Shape

Oval

Finish

Natural

Flange Thickness (in)

3/8 in.

Gasket Or Seal Included

Yes

Gaskets Included

Yes

Grade Type

Performance

Header Finish

Natural

Header Material

Stainless steel

Header Style

Long Tube

Material

304 Stainless Steel

Mounting Hardware Included

Yes

Port Shape

Oval

Primary Tube Gauge

16-gauge

Quantity

Sold as a kit.

Thank you Boat plicity. Everything turned out as Descrived. And looking forward to Reorder From You Soon

Great Deal!

Quick & Easy

So far so good

so far so good

Easy ordering, great customer service experience and fast delivery. My only issue with my order was my product was bent when we opened the package but due to timing of needing the item we had no choice but to keep the product and use it.

Good experience

.

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