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Description
XForce | Header & Metallic Cat Kit | Subaru Impreza GC GD GG N/A 1996–2007 | H2-SW11B-KITXForce Header & Metallic Cat Kit Subaru Impreza GC GD GG N A (1996 2007) H2 SW11B KIT Transform the performance of your Naturally Aspirated (Non Turbo) Subaru Impreza with the XForce Header and Cat Kit. Engineered for Flow, this kit features a high efficiency 4 2 1 Tri Y design and a 100 cell metallic high flow cat. This combination significantly reduces backpressure compared to the factory manifold, providing a noticeable increase in power and
XForce Header & Metallic Cat Kit - Subaru Impreza GC GD GG N/A (1996 - 2007) - H2-SW11B-KIT
Transform the performance of your Naturally Aspirated (Non-Turbo) Subaru Impreza with the XForce Header and Cat Kit. Engineered for Flow, this kit features a high-efficiency 4-2-1 Tri-Y design and a 100-cell metallic high-flow cat. This combination significantly reduces backpressure compared to the factory manifold, providing a noticeable increase in power and throttle response. Please note: This kit produces an equal-length exhaust pulse and does not maintain the traditional "boxer rumble" note. It is designed only to fit with XForce cat-back systems.
What's in the Box?
- XForce 4-2-1 Tri-Y Design Header (Matt Finish Stainless)
- 2.5" High-Flow 100 Cell Metallic Catalytic Converter
- Installation Gaskets & Bolt Kit
Features:
This product offers the following high-performance features:
- Tri-Y Design Header: Optimized 4-2-1 layout for improved mid-range torque and top-end power.
- Matt Finish Stainless Steel: Durable construction with a professional aesthetic.
- High-Flow Metallic Cat: 2.5" outlet with 100-cell core for maximum exhaust scavenging.
- Performance Sound: Delivers a crisp, refined exhaust note (Equal Length).
Specifications:
- Make: Subaru
- Model: Impreza (Naturally Aspirated)
- Series: GC, GD, GG
- Year Range: 1996 - 2007
- Material: Matt Finish Stainless Steel
- Outlet Size: 63.5mm (2.5")
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 XForce H2-SW11B-KIT
| Make | Model | From | To | Body | Series | Engine | Variant | Drivetrain |
|---|---|---|---|---|---|---|---|---|
| SUBARU | ||||||||
| SUBARU | IMPREZA | 10/2005 | 12/2007 | Hatchback | - | EJ204 | 2.0L | i | AWD |
| SUBARU | IMPREZA | 12/2002 | 12/2007 | Hatchback | - | EJ201 | 2.0L | i | AWD |
| SUBARU | IMPREZA | 12/2000 | 06/2007 | Wagon | GG (GG9) | EJ201 | 2.0L | i | AWD |
| SUBARU | IMPREZA | 09/1999 | 12/2007 | Sedan | GD (GD9) | EJ201 | 2.0L | i | AWD |
| SUBARU | IMPREZA | 12/2002 | 09/2005 | Hatchback | GG (GGE) | EJ25 | 2.5L | i | AWD |
| SUBARU | IMPREZA | 01/2001 | 09/2005 | Sedan | GD (GDE) | EJ251 | 2.5L | i | AWD |
| SUBARU | IMPREZA | 12/2001 | 11/2002 | Sedan | GD (GDA) | EJ205 | 2.0L | i | AWD |
| SUBARU | IMPREZA | 09/1999 | 10/2000 | Sedan | GC (GC8) | EJ201 | 2.0L | i | AWD |
| SUBARU | IMPREZA | 09/1998 | 09/2000 | Sedan | GC (GC7) | EJ201 | 2.0L | i | FWD |
| SUBARU | IMPREZA | 11/1996 | 09/1998 | Sedan | GC (GC8) | EJ201, EJ20E | 2.0L | i | AWD |
| SUBARU | IMPREZA | 11/1996 | 09/1998 | Wagon | GF (GF8) | EJ201, EJ20E | 2.0L | i | AWD |
| SUBARU | IMPREZA | 07/1996 | 08/1998 | Sedan | GC (GC7) | EJ20E | 2.0L | i | FWD |
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
4.5 ★★★★★
Based on 1463 reviews
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Product Reviews
★★★★★ 5
Great customer service.
Glad I bought the protection. The vaccume worked great for a while then quit holding a charge. They refunded my purchase price (Amazon gift card).
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 12, 2025
★★★★★ 5
Game changer..get one!
My floors had varying levels of dirt (think heavy traffic area vs lighter traffic areas) and the detection system masterfully targeted areas until they were super clean. This is a good value, time saving and elevated my quality of life.
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Reviewed in the United States on May 1, 2026
★★★★★ 5
Works great, might have to use distilled water if you have hard water
So far it's great!
It uses a LOT of water on the first clean (and maybe also because of using the 'Freo' ai mode) you can use tap water, but in areas with hard water, you might need to go through a lot of distilled water.
I think on future cleaning jobs it's supposed to use less water though. And you can adjust the cleaning level to a lower setting so that it doesn't use as much.
The app takes a little while to get used to, because there are many options and menus. But still very nice to have and use.
The vacuum has a dust bin with a very basic filter (needs replaced every 30 days if used), but if you want more of 'Hepa' clean air, you would have to use another type of vacuum before mopping.
It also doesn't get close to the edges of some areas for some reason, even thought it could fit.
Still, for what it is, it's a great product that will cut down on a lot of mopping time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 25, 2025
★★★★★ 5
Worth every penny. Highly recommend!
To say I love my Narwal robotic mop and vacuum is an understatement—total game changer. I can’t imagine going back to any other robotic vacuum.
I have two dogs, including a Jack Russell who sheds like Pig-Pen from Peanuts—basically a walking cloud of hair—and this thing handles it effortlessly.
The vacuum + mopping combo is amazing, and it’s so easy to use and maintain. It truly does all the dirty work for me.
I did have a small hiccup about two months in, but Narwal support helped me reset it quickly and it’s been perfect ever since (I definitely panicked for a minute 😅).
Worth every penny. Highly recommend!
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Reviewed in the United States on April 14, 2026
★★★★★ 1
Unreliable. Doesn't work.
Has been every unreliable. Misses lots of spots with horrible mapping. Doesn't go some places for some reason. We moved the furniture, tried remapping but nothing works. Randomly goes in circles in the same spot at times. Updated firmware, spoke to support etc. When using vacuum and Mop option, it skips carpets and doesn't go back to do them afterwards. The whole programming is unreliable. Don't BUY. Can't return it past the warranty/return period.
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Reviewed in the United States on April 22, 2026
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