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Kooks 3" Green Catted Downpipes for 2017 and 2020 Ford F-150 Raptor 3.5L EcoBoost
The Kooks 13623300 3-inch Green catted downpipes replace the restrictive factory units on 2017 and 2020 Ford F-150 Raptor 3.5L EcoBoost trucks, delivering dyno-verified gains of 40 and 60 rear-wheel horsepower and 70 and 90 lb-ft of torque by eliminating pre-turbo bottlenecks and dramatically reducing backpressure ahead of the twin turbos. Hand-fabricated from T304 stainless steel with high-flow 300-cell metallic substrate GREEN cats, these downpipes bolt directly to the factory turbochargers and OEM exhaust without cutting or welding while maintaining 49-state emissions compliance.
The mandrel-bent tubing, 3/8-inch laser-cut flanges, and full TIG welds ensure zero leaks under boost pressures exceeding 25 PSI and support power levels over 800 HP with larger turbos or E85 tuning. The design preserves ground clearance and heat shielding for daily-driven Raptors while providing instant spool, sharper throttle response, and a deeper turbocharged growl without drone.
For Raptor owners chasing maximum EcoBoost performance with street-legal emissions, the 13623300 downpipes unlock the full potential of the 3.5L twin-turbo platform for desert runs, towing, or dyno domination.
Key Features
- Full 3-inch mandrel-bent T304 stainless construction
- 300-cell GREEN high-flow metallic catalytic converters
- Direct bolt-on to factory turbos and mid-pipe
- 3/8-inch laser-cut flanges with OEM-style gaskets
- Dyno gains of 40 and 60 RWHP and 70 and 90 RWTQ
- Supports 800+ HP with tuning and supporting mods
Product Notes
- 49-state EPA compliant not for sale or use in California or CARB states without exemption
- Fits 2017 and 2020 Raptor only (Gen 1 EcoBoost)
- Includes O2 sensor extensions and all necessary hardware
California Proposition 65: Contains chemicals known to the State of California to cause cancer or reproductive harm.
Warranty: Limited lifetime on stainless construction and 25,000 miles on catalytic converters.
Installation Notes
- Professional installation recommended lift required
- Support turbos and remove factory downpipes
- Bolt new downpipes using supplied hardware torque to 30-35 ft-lbs
- Install O2 extensions and perform drive cycle for ECU adaptation
This Part Fits
| Year | Make | Model | Engine |
|---|---|---|---|
| 2017 and 2020 | Ford | F-150 Raptor | 3.5L EcoBoost V6 (High Output) |
Note: Fits all 2017 and 2020 Raptor cab/bed configurations. Does not fit 2021+ Gen 2 Raptor.
What's Included in the Purchase
- (2) 3" Green Catted Downpipes (Driver & Passenger)
- Gaskets, Flange Bolts, and Hardware Kit
- O2 Sensor Extension Harnesses
- Detailed Installation Instructions
- Part Number: Kooks 13623300
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 performance
Frequently Asked Questions
-
Q: Will this fit my 2021 Raptor?
A: No, only fits 2017 and 2020 (Gen 1). 2021+ uses different turbo placement. -
Q: Does it throw a check engine light?
A: No, GREEN cats and included extensions maintain proper O2 readings. -
Q: How much faster does it spool?
A: Most owners report 300 and 500 RPM earlier full boost with supporting tune. -
Do Kooks headers require a tune after installation?
Yes. A professional tune is strongly recommended after installing long tube headers. The significant improvement in exhaust flow changes air fuel ratios and requires ECM recalibration to achieve optimal power output and safe operation. -
Will these headers void my factory powertrain warranty?
Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty simply because you installed an aftermarket part unless they prove the component directly caused the failure. Consult your dealer for specifics on your situation. -
Q: Do these Kooks headers require a tune after installation?
A: Yes. A professional tune is strongly recommended after installing long tube headers. The significant improvement in exhaust flow changes air fuel ratios and requires ECM recalibration to achieve optimal power output and safe operation. -
Q: Will Kooks headers void my factory powertrain warranty?
A: Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty simply because you installed an aftermarket part unless they prove the component directly caused the failure in question. Consult your dealer for specifics. -
Q: What warranty does Kooks provide?
A: Kooks products are backed by a limited lifetime warranty to the original purchaser against defects in materials and workmanship. Racing and competition use applications may have specific warranty exclusions. Contact Kooks Performance directly for warranty details.
Shipping & Handling
- Method: UPS or Fed Ex Ground.
- Availability: Typically ships same day or next if in stock.
- Packaging: Heavy-duty wooden crate with foam protection.
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