SKU: 36903949990

XForce | 1 7/8" Tuned-Length Headers & 3" Cat Kit | Ford Mustang GT S550 2018–2023 | H2-FM18-KITB

Sale price$807.98 Regular price$897.75
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Ships within 48 hours · Estimated delivery Sep 21 - Sep 26

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Description

XForce | 1 7/8" Tuned-Length Headers & 3" Cat Kit | Ford Mustang GT S550 2018–2023 | H2-FM18-KITBXForce 1 7 8" Tuned Length Performance Header Kit Ford Mustang GT S550 (Facelift) H2 FM18 KITB Unleash the full potential of your Ford Mustang GT S550 Facelift with the XForce Performance Header Kit. Engineered with precision for the 5. 0L Coyote V8, this 4 1 tuned length design features large 1 7 8" primary pipes that merge into a 3" outlet, drastically optimizing exhaust scavenging and flow. The kit is equipped with dual 3" 200 cell high flow

XForce 1 7/8" Tuned-Length Performance Header Kit - Ford Mustang GT S550 (Facelift) - H2-FM18-KITB

Unleash the full potential of your Ford Mustang GT S550 Facelift with the XForce Performance Header Kit. Engineered with precision for the 5.0L Coyote V8, this 4-1 tuned-length design features large 1 7/8" primary pipes that merge into a 3" outlet, drastically optimizing exhaust scavenging and flow. The kit is equipped with dual 3" 200-cell high-flow metallic catalytic converters, ensuring unrestricted airflow and significant performance gains in both horsepower and torque. Crafted from durable non-polished stainless steel, this system is built to withstand high-performance driving while delivering the aggressive, raw V8 soundtrack your Mustang deserves. Whether you are hitting the track or the street, XForce delivers the perfect blend of power, efficiency, and style.

What's in the Box?

  • 2x 1 7/8" Tuned-Length Stainless Steel Headers (Left & Right)
  • 2x 3" 200-Cell High-Flow Metallic Catalytic Converters
  • 3" Pipework after Collector Flanges
  • Installation Gaskets & Hardware

Features:

This product offers the following high-performance features:

  • 1 7/8" Tuned-Length Primaries: Meticulously engineered to maximize exhaust gas velocity and engine breathing for the Gen 3 Coyote V8.
  • Dual 3" 200-Cell High-Flow Cats: High-performance metallic cores provide far less restriction than factory units for maximum power delivery.
  • 4-1 Collector Design: Optimized for high-RPM flow and peak horsepower gains.
  • Stainless Steel Construction: Durable, high-grade stainless steel with a functional non-polished finish for long-term reliability.
  • Versatile Fitment: Precision-engineered to bolt up to both XForce cat-back systems and the OEM factory cat-back exhaust.

Specifications:

  • Make: Ford
  • Model: Mustang GT
  • Series: S550 (Facelift Models)
  • Engine: 5.0L Coyote V8 (Gen 3)
  • Part Number: H2-FM18-KITB
  • Material: Stainless Steel (Non-Polished)
  • Header Style: 4-1 Tuned-Length
  • Primary Size: 1 7/8"
  • Cat Size: Dual 3" (200-Cell Metallic)

Important Information

  • The image shown may not reflect the actual product; the system features a non-polished finish.
  • Shipping times may vary depending on destination and stock availability
  • Tuning: A professional ECU tune is required after installation to optimize engine performance and prevent check engine lights.

Vehicle Applications:

Make Model From To Body Series Engine Variant Drivetrain
FORD
FORD MUSTANG 2018 2023 Fastback / Convertible S550 (Facelift) 5.0L V8 GT / Mach 1 RWD

 

Warranty Information
Product Type Warranty Period
304 & 201 Stainless Steel Exhaust Systems 60 Months
Accessories 12 Months
Catalytic Converters 12 Months
Electronic Products (Including SmartBox) 12 Months
Mild Steel & 409 Stainless Steel Exhaust Systems 24 Months
Mild Steel Headers 12 Months
Stainless Steel Headers 24 Months
Universal 304 Stainless Steel Mufflers 24 Months
Universal Mild Steel & 409 Stainless Steel Mufflers 12 Months

Payment & Security:
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 36903949990

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4.2 ★★★★★
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Verified Purchase
John J
Bozeman, US
★★★★★ 5
Way better than the M size for us
Like most people that have dogs I first went with the M size or Tennis ball size (about 2.5") chuckit for my 65-70 lbs Lab. After having that for a while and my dogs' evolution from liking to chase the ball to wanting to catch it, I started seeing how the M size could cause some life threating problems for my pup. I was on the fence for several weeks when I came across this option that included a 3" ultra ball as well as a 3" fuzzy tennis ball like ball. These balls can fly so much farther with less effort and my furry friend seeming to like them more than the 2.5 inch. It also seems to fit their mouth better allowing them to enjoy 'the game' (you lost by the way) much more. If you have a larger dog or your dog has a big mouth, please trust me when I say skip the 2.5" M size balls. You and your dog will haves much more fun with this 3" size
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 10, 2024
D
Verified Purchase
Donna Sue
New York, US
★★★★★ 5
Chuck it ball launcher
This is great! I have a blue healer that loves it. She will play fetch with the ball all day long. The launcher is easier on my shoulder. I can throw the ball twice as far and when she brings the ball back I can grab it with the launcher without touching a spit covered ball. Awesome buy!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2025
S
Stephanie Straub
Charlottesville, US
★★★★★ 5
Good find
Chuckit products are great, and was glad to find this for the Pitties that I pet sit for
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 23, 2025
D
Verified Purchase
D.G.
Phoenix, US
★★★★★ 5
Great ball!
Color: Ultra, Size: Large
Our puppy loves this ball. It has held up well so far, it’s about 2 weeks now of large breed pup play. It’s been outside for the last week, rain or shine, still in working order. Not as big as I thought it would be though. No squeak, bounces well. Thick rubber like material, that can be depressed when biting down.
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Reviewed in the United States on May 14, 2026
A
Verified Purchase
AnaC
Massapequa, US
★★★★★ 5
Great Quality and durability
Color: Ultra, Size: Large
I have a teething puppy and this is the only ball that has outlasted the rest!! Big chewer and still bounces and no tears! Keeps him entertained for hours!! Sturdy, solid, good quality and value!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 12, 2026

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