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Description
XForce | 3" Varex Valved Cat Back Exhaust | Subaru WRX STI 2003–2007 | E4-SW05VMK5-CBSXForce 3" Varex Valved Cat Back Exhaust System Subaru WRX & STI E4 SW05VMK5 CBS The XForce Cat Back Exhaust System featuring the patented Varex Rear Muffler is the ultimate upgrade for 20032007 Subaru WRX and STI owners who demand total control over their vehicle's acoustic personality. Expertly crafted from high quality raw 409 stainless steel, this system utilize 3" mandrel bent tubing to maximize exhaust flow and significantly improve engine
XForce 3" Varex Valved Cat-Back Exhaust System - Subaru WRX & STI - E4-SW05VMK5-CBS
The XForce Cat-Back Exhaust System featuring the patented Varex Rear Muffler is the ultimate upgrade for 2003–2007 Subaru WRX and STI owners who demand total control over their vehicle's acoustic personality. Expertly crafted from high-quality raw 409 stainless steel, this system utilize 3" mandrel-bent tubing to maximize exhaust flow and significantly improve engine performance. The heart of the system is the Varex valved muffler, allowing you to switch between a discreet, neighbor-friendly quiet mode and an aggressive, high-flow boxer growl at the touch of a button. Whether it's the daily commute or a weekend track day, this system provides the perfect balance of performance, versatility, and style.
What's in the Box?
- 1x 3" Raw 409 Stainless Steel Center Section with Hot-Dog Resonator
- 1x Varex Valved Oval Rear Muffler
- 2x 80mm Polished Exhaust Tips
- 1x Varex Control Kit (Wiring Harness & Remote Keys)
- All Required Gaskets and Hardware
Features:
This product offers the following high-performance features:
- Patented Varex Valve Technology: In-muffler valve control allows for manual adjustment of sound levels from stock-quiet to open-performance.
- 3" Mandrel-Bent Tubing: Ensures a smooth, unrestricted exhaust path for improved turbo spool and horsepower gains.
- Raw 409 Stainless Steel: Durable industrial-grade construction designed to withstand high heat and provide long-lasting service.
- Acoustic Versatility: Equipped with a center hot-dog resonator to refine the tone and a Varex oval rear muffler for ultimate sound customization.
- Twin 80mm Tips: Classic twin-tip design provides a clean, performance-oriented aesthetic that fits perfectly in the factory bumper cutout.
Specifications:
- Make: Subaru
- Model: WRX / STI
- Year Range: 2003–2007
- Material: Raw 409 Stainless Steel
- Pipe Size: 3 Inch (76mm)
- Tip Size: Twin 80mm
- Muffler Type: Varex Valved
Important Information
- The image shown may not reflect the actual product
- Shipping times may vary depending on destination and stock availability
- Fitment Note: Fits Manual transmission vehicles only.
- Installation Note: Some models require connecting pipe E4-SW05-C1 to be ordered separately for bolt-on application when fitting to vehicles with a standalone catalytic converter.
Vehicle Applications:
Vehicle Applications:
| Make | Model | From | To | Body | Series | Engine | Variant | Drivetrain |
|---|---|---|---|---|---|---|---|---|
| SUBARU | ||||||||
| SUBARU | WRX / STI | 2003 | 2005 | Sedan / Wagon | GD / GG | EJ20 Turbo | Manual Only | AWD |
| SUBARU | WRX / STI | 2005 | 2007 | Sedan / Wagon | GD / GG | EJ25 Turbo | Manual Only | AWD |
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
4.4 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
Ohhh Mr. Iguana
Size: Medium/Large, Color: Illana the Iguana - Large
Mr. Iguana is a house favorite! I got my first one of these in a barkbox and my dog loved it so much, i went on the hunt for another one. Amazon saved the day! I own about 7 of these now. They are prefect for dogs just love to chew, they hold up great! And they are heavy duty, super easy to clean! My dogs are very happy, great value for the money! Doesn't have a smell, vibrant colors! Noise level is quiet, minus my dogs chewing !
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 13, 2025
★★★★★ 3
Not for strong chewers
Size: Medium/Large, Color: Dog Ness Monster - Large
Initially, I really liked this for my dog. She is about 8 months old and still loves to chew and destroys most toys in a few minutes. When we got this, it seemed like it would hold up for a while despite being clearly gnawed on. Unfortunately, once she focused on the softer "water" portion of the toy, that is where things went downhill with this toy. After a few short chew sessions, she was tearing chunks out of it. We had purchased a replacement since she liked the original so much, and after about 5 minutes with the replacement, she had taken enough out of the blue section that we immediately threw that one out as well. Overall while the green portion held up, the blue didn't. I can't recommend this for strong chewers.
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Reviewed in the United States on December 8, 2025
★★★★★ 4
Definitely not indestructable
Size: Medium/Large, Color: Dog Ness Monster - Large, Size: Medium/Large, Color: Dog Ness Monster - Large
I have a 1-year-old toy fox terrier (Rocky, pictured). He has been chewing on this toy for seven months now; it is one of his favorites. He has been unable to seriously damage the "ocean" portion of this toy, but as you can see from the provided image, the sea serpent has not faired that well. It is missing its snout and smaller portions of the humps. My guess is that the advertiser images showing much larger dogs with "like new" versions of the toy are just that...NEW AND UNCHEWED.
I have not had to clean up bits of this toy from my floor, so I assume Rocky has been swallowing them. My hope is that the yellow material of the serpent is not chemically dangerous when exposed to digestive fluids.
Rocky easily destroys plush toys in a matter of days if not hours and, consumed pieces of a small microfiber blanket that he liked to toss around and play tug-of-war with (past tense as he destroyed it and has since been trashed after I began finding feces-stained undigested pieces of it lying around). Since this toy has survived seven months and has remained recognizable, I have to agree it is durable.
Just beware, if my small toy fox terrier can damage the toy as pictured, expect your large breed chewer to do similar or worse damage. Also, the toy is very heavy! When Rocky drops it down a flight of stairs, it makes a MAJOR thud at the bottom, and sometimes makes me wonder if it might crack the large tile at the bottom.
I cautiously recommend the product.
Note the yellow frisbee in Rocky's picture. It is only a few months old and surprisingly has not suffered any chew damage despite substantial abuse. It appears to bend in the wind like a proverbial reed, evading damage by yielding to pressure.
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Reviewed in the United States on July 5, 2024
★★★★★ 5
They were tough, but not mower blade tough
They were holding up well for my doggy that eats and destroys everything. He was sad when daddy didn't see it in the yard when he mowed. Does not hold up to mower blades sadly enough lol.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Tough, Durable, and Great for Heavy Chewers
The Feeko Heavy Duty Dog Rope Toys (2-pack) have been a great addition for my dog, who is a large breed and absolutely destroys most toys within days. These ropes have held up far better than expected and have become a go-to for daily tug-of-war sessions.
The ropes are thick, tightly woven, and feel genuinely sturdy. Even with constant chewing and pulling, they’ve shown very minimal fraying so far. My dog loves grabbing both ends for tug games, and I like that it keeps him engaged and active.
Another nice bonus is the teeth-cleaning benefit. While it’s not a replacement for dental care, the fibers definitely help reduce some buildup as he chews and plays, which is a nice added perk.
The size is also appropriate for medium to large dogs—easy for them to grip without being too small or flimsy. Having two ropes in the pack is great for rotation or multi-dog households.
The only thing to note is that, like all rope toys, they’re not truly “indestructible.” Very determined power chewers will eventually cause wear over time, so supervision is still recommended.
Overall, this is a durable, well-made set of dog rope toys that holds up well for aggressive chewers and provides great value for the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
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