Kooks 20-22 Ford F250 7.3L V8 / Ford F350 7.3L V8 1-7/8in x 3in SS Headers w/ Green Catted Conn

Kooks 1-7/8" x 3" Long Tube Headers & GREEN Catted Connection Kit for 2020–2022 Ford F-250/F-350 Super Duty 7.3L V8

The Kooks 1400H430 1-7/8-inch long tube headers and GREEN catted connection kit delivers the complete bolt-on exhaust upgrade for 2020–2022 Ford F-250 and F-350 Super Duty trucks with the 7.3L Godzilla V8, replacing factory manifolds to provide dyno-proven gains of 50–70 rear-wheel horsepower and 45–65 lb-ft of torque through equal-length primaries, merged collectors, and high-flow 3-inch GREEN catted pipes that connect directly to the OEM mid-section for unrestricted exhaust flow from low-end grunt to high-RPM towing power.

Handcrafted from T304 aircraft-quality stainless steel with 3/8-inch laser-cut oval-port flanges, full TIG welds, and 400-cell metallic substrate GREEN catalytic converters, this system supports up to 850 HP while maintaining 49-state emissions compliance and improving throttle response for quicker acceleration during heavy hauls up to 21,000 lbs or daily highway passing. The precision design preserves ground clearance and heat management for work-ready Super Duty trucks without sacrificing the deep V8 rumble that enhances cabin experience.

For F-250/F-350 7.3L owners seeking immediate power and torque improvements with durable, emissions-legal construction, the 1400H430 kit unlocks the Godzilla engine's full potential for job sites, trails, or performance driving.

Key Features

• 1-7/8-inch equal-length mandrel-bent primaries for optimal scavenging
• 3-inch GREEN high-flow 400-cell metallic catalytic converters
• Full T304 stainless steel with TIG welds and 3/8-inch oval-port flanges
• Merged collectors for maximum exhaust velocity
• Direct bolt-on to OEM mid-pipe no cutting required
• Dyno gains of 50–70 RWHP and 45–65 RWTQ on stock 7.3L

Product Notes

• 49-state EPA compliant not for sale or use in California or CARB states without exemption
• Fits all cab/bed configurations with 7.3L V8 gas engine
• Includes O2 sensor extensions and EGR provisions

California Proposition 65: Contains chemicals known to the State of California to cause cancer or reproductive harm.

Warranty: Limited lifetime on stainless construction to original purchaser.

Installation Notes

• Professional installation recommended lift required
• Remove factory manifolds and bolt headers to cylinder heads
• Connect catted pipes to collectors and OEM mid-section with supplied hardware
• Torque flanges to 25-30 ft-lbs and run drive cycle for ECU adaptation

This Part Fits

Note: Fits all cab styles and drivetrains with 7.3L V8 gas engine. Excludes Power Stroke diesel.

What's Included in the Purchase

• (2) 1-7/8" x 3" Long-Tube T304 Stainless Headers with Merged Collectors
• (2) 3" GREEN Catted Connection Pipes
• Gaskets, Stage 8 Locking Header Bolts, and Hardware Kit
• O2 Sensor Extensions
• Detailed Installation Instructions
• Part Number: Kooks 1400H430

Why Choose Kooks?

• Over 60 years of exhaust engineering with NHRA, NASCAR, and SCCA championships
• Handcrafted in the USA from T304 aircraft-quality stainless steel
• Limited lifetime warranty and dyno-proven for reliable power

Frequently Asked Questions

• Q: Does this fit my 2021 F-350 Lariat 7.3L?
  A: Yes, direct bolt-on for all 2020–2022 F-250/F-350 with 7.3L V8 gas
• Q: Will it cause a check engine light?
  A: No, GREEN cats and extensions maintain proper O2 sensor function
• Q: What power gains can I expect?
  A: 50–70 RWHP and 45–65 RWTQ on stock tune, more with ECU optimization

Shipping & Handling

• Method: UPS or Fed Ex Ground.
• Availability: Typically ships same day or next if in stock.
• Packaging: Heavy-duty box with foam protection.