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Ships within 48 hours · Estimated delivery Jul 31 - Aug 5
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For Your Every Summer RSVP, with Code: SUMMER15
Description
XForce | 1-7/8" Headers & 3" Hi-Flow Cats | Ford Mustang GT S550 FM GEN 6 2014–2017 | H2-FM15KITXForce XForce Header and Cat Kit Ford Mustang GT S550 FM H2 FM15KIT Unleash the full potential of your Ford Mustang GT S550 with the Xforce Header Kit. This precision engineered 4 1 design features large 1 7 8" primary pipes that significantly reduce backpressure and improve exhaust scavenging for massive power and torque gains. Note: This kit only bolts directly to Xforce cat back systems and requires an ECU tune and PEX4178 loom extensions for
XForce XForce Header and Cat Kit - Ford Mustang GT S550 FM - H2-FM15KIT
Unleash the full potential of your Ford Mustang GT S550 with the Xforce Header Kit. This precision-engineered 4-1 design features large 1-7/8" primary pipes that significantly reduce backpressure and improve exhaust scavenging for massive power and torque gains. Note: This kit only bolts directly to Xforce cat-back systems and requires an ECU tune and PEX4178 loom extensions for installation.
What's in the Box?
- 1x 1-7/8" Tuned-length Headers (Pair)
- 2x 3" 200-Cell High-Flow Metallic Catalytic Converters
- All Necessary Installation Gaskets & Bolts
Features:
This product offers the following high-performance features:
- Tuned Length Primaries: 1-7/8" (47mm) primary pipes optimized for maximum exhaust flow and V8 performance.
- High-Flow Metallic Cats: Dual 3" 200-cell metallic converters ensure unrestricted airflow while maintaining essential emissions functionality.
- 409 Stainless Steel: Constructed from non-polished 409-grade stainless steel for high-heat durability and long-term reliability.
Specifications:
- Make: Ford
- Model: Mustang GT S550
- Year Range: 2014–2017
- Material: 409 Stainless Steel
- Pipe Size: 1-7/8" Primaries to 3" Outlet
Important Information
- The image shown may not reflect the actual product
- Shipping times may vary depending on destination and stock availability
Vehicle Applications:
Vehicle Applications for H2-FM15KIT
| Make | Model | From | To | Body | Series | Engine | Variant | Drivetrain |
|---|---|---|---|---|---|---|---|---|
| FORD | ||||||||
| FORD | MUSTANG | 01/2015 | 07/2017 | Coupe | GEN 6 | 5.0L | V8 | RWD |
| FORD | MUSTANG | 12/2014 | 07/2017 | Convertible | FM, FN | MF8F | 5.0L | GT | RWD |
| FORD | MUSTANG | 12/2014 | 07/2017 | Coupe | FM, FN | MF8F | 5.0L | GT | RWD |
| FORD | MUSTANG | 08/2014 | 07/2017 | Convertible | FM | COYOTE | 5.0L | GT | RWD |
| FORD | MUSTANG | 08/2014 | 07/2017 | Coupe | FM | COYOTE | 5.0L | GT | 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:
- 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
4.8 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 5
Fresh & Clean
Scent: Citrus + Eucalyptus, Size: 12.2 Fl Oz (Pack of 1)
Excellent product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
★★★★★ 5
Good value
Scent: Citrus + Eucalyptus, Size: 12.2 Fl Oz (Pack of 1)
Great scent and lathers well with small amounts.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
★★★★★ 5
Best Clay for Natural Look and Feel!
As a hairstylist with a very strong focus on men’s hair for over 20 years, I applaud the guys at Highland for what they are doing. A product line with quality and minimal ingredients we can actually read and understand. This clay is what I have always wanted!! Sure you’ll see some reviews talking about how there isn’t enough hold or it’s not even a medium hold when it says it’s strong hold on the package, but you have to understand, when a product is this clean, strong hold isn’t going to feel like the strong hold in the garbage products most of us have used. This is a strong hold, in terms of keeping your best natural look all day. Something you can work into place, then continuously run your hands through all day and it still looks great. The men’s clay from Davines does a wonderful job at this too, but there’s something about the finish of this product that literally brings out such a healthy natural look. Not shiny either and definitely does not give you a wet look out of the shower. If you see that kind of review, the guy most likely has greasy hair, is using cheap conditioner, or perhaps applied too much. Don’t over use this product in your application, you get the best out it. Amazing work Highland, keep it up!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 11, 2025
★★★★★ 5
Amazing product, definitely recommend!
Initially I was very skeptical about buying this product and kept talking myself out of it, did that a few times. I was under the impression that this was just an incredibly well orchestrated marketing campaign(it kept popping up all over social media) and people just out there overhyping it all. Yesterday I finally decided to give it a try and I have to say, BOY WAS I WRONG, this is probably the best hair product I’ve used in 15 years. Gives a natural matte look to your hair, it’s not greasy, gives plenty of volume and holds your styling in place in a very natural manner. The product also smells pretty good, HIGHLY recommend if you’re having doubts.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2026
★★★★★ 5
It delivers, but damn is it expensive
This product mainly shines because everything available at a brick and mortar shop is terrible - at least for men. This is great stuff, great hold without being greasy or turning your hair into spikes. No pungent odors. It's noted that it includes pine and sandalwood oil. There's definitely some pine, not getting any sandalwood. Regardless, it isn't a strong scent and that's how it should be. The tin is almost exactly the size of a snuff can. Expensive. But you don't really use much of it at one time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
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