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Description
XForce | Twin 2.5" Cat Back Exhaust Straight Pipe Rear | Holden VU VY VZ LS1 5.7L 2000–2007 | E4-HV21-3-CBSXForce Twin 2. 25" Performance Cat Back Exhaust System Holden VU VY VZ LS1 5. 7L E4 HV21 3 CBS Upgrade your LS1 powered VU, VY, or VZ Holden with the XForce Twin 2. 5" Cat Back System. Constructed from robust raw finish 409 stainless steel, this system is engineered to optimize exhaust flow and significantly boost performance. Featuring twin 2. 5" mandrel bent pipework and two centre straight through mufflers combined with a straight pipe rear
XForce Twin 2.25" Performance Cat-Back Exhaust System - Holden VU VY VZ LS1 5.7L - E4-HV21-3-CBS
Upgrade your LS1-powered VU, VY, or VZ Holden with the XForce Twin 2.5" Cat-Back System. Constructed from robust raw finish 409 stainless steel, this system is engineered to optimize exhaust flow and significantly boost performance. Featuring twin 2.5" mandrel-bent pipework and two centre straight-through mufflers combined with a straight pipe rear section, this setup delivers a raw, aggressive, and unfiltered V8 growl that is sure to turn heads. The system is finished with twin 3" tips, providing a classic performance look to match the powerful sound of your 5.7L engine.
What's in the Box?
- 1x Twin 2.5" Raw 409 Stainless Steel Cat-Back Pipework
- 2x Centre Straight-Through Performance Mufflers
- 1x Straight Pipe Rear Section (No Rear Mufflers)
- Twin 3" Polished Exhaust Tips
- All Required Gaskets and Bolt Kit
Features:
This performance cat-back system offers the following high-impact features:
- Twin 2.5" Mandrel-Bent Piping: Maximizes exhaust gas velocity for improved throttle response and horsepower gains.
- Raw 409 Stainless Steel: Heavy-duty construction designed for long-lasting durability and high heat resistance.
- Straight-Through Center Mufflers: Reduces backpressure while maintaining a deep, refined tone.
- Straight Pipe Rear Section: Deletes the rear mufflers for a louder, more aggressive exhaust note.
- Twin 3" Tips: Polished finish to provide a sporty and powerful aesthetic at the rear of your vehicle.
Specifications:
- Make: Holden / HSV
- Model: Commodore / Ute / Maloo
- Series: VU, VY, VZ
- Year Range: 2000–2007
- Engine: 5.7L LS1 V8
- Material: 409 Stainless Steel
- Pipe Size: Twin 2.5 Inch (63mm)
- System Layout: Cat-Back System with Straight Pipe Rear
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 E4-HV21-3-CBS
| Make | Model | From | To | Body | Series | Engine | Variant | Drivetrain |
|---|---|---|---|---|---|---|---|---|
| HOLDEN | ||||||||
| HOLDEN | COMMODORE | 2000 | 2002 | Ute / Sedan | VU | LS1 | 5.7L | Petrol | SS | RWD |
| HOLDEN | COMMODORE | 2002 | 2004 | Ute / Sedan | VY | LS1 | 5.7L | Petrol | SS | RWD |
| HOLDEN | COMMODORE | 2004 | 2006 | Ute / Sedan | VZ | LS1 | 5.7L | Petrol | SS | RWD |
| HSV | ||||||||
| HSV | MALOO | 2000 | 2007 | Ute | VU, VY, VZ | LS1 | 5.7L | Petrol | - | RWD |
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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
4.6 ★★★★★
Based on 947 reviews
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Product Reviews
★★★★★ 5
i would recommend these shoes
Size: 11, Color: Black White 05
great shoes for the price. very comfortable...
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Great Fit, Lightweight, and Totally Quiet
Size: 11, Color: New Black05
Great fit and very comfortable once you pick the right size. Lightweight, breathable, and completely silent on hard floors. No squeaks or “suction” sounds like some reviews claimed. Normal packaging, normal opening, no issues at all. Excellent value for the price.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Most comfortable shoes I've ever worn
Size: 11, Color: New Black05
First off, I was not expecting much buying a no-name shoe online, especially for the price. Boy was I in for a surprise...
I've owned these for almost a full year, and can confidently say these are the most comfortable shoes I've ever worn. I normally wear a size 11 and these fit me perfectly. Prior to this the most comfortable shoes I had were some Cole Haans with the Nike air technology. These shoes are so lightweight, so comfortable, I can wear them all day long without feeling a thing. Whenever I (rarely) need to wear a different pair of shoes, I am immediately reminded of how much I used to hate wearing shoes and couldn't wait to take them off.
Based on the price, I expected them to wear down quickly. However they are still going strong. Running, hiking, long walks, biking, worn to office / casual events. These shoes have been soaked in mud multiple times, but clean up easily by just throwing them in the washing machine and then the dryer. The soles and the insoles have both worn down a bit over the past year; at this rate I expect to get 1.5 to 2 years out of them before needing to be replaced. So far I must have put at least a thousand miles on these shoes based on how much I wear them.
They look good too. I have the all-black pair, and they look decent with jeans and a button up shirt for a night out, but also look natural in an athletic setting with shorts and no socks. Very versatile and subtle.
Now for the cons, which are minor. The pattern on the bottom of the sole is prone to some squeaking/suction sounds at first. However after about a month some of the ridges wore down just enough that it was no longer a problem. Second: they are not as breathable as I would have liked. For example, when running or biking, you don't feel any air on your feet. Wearing them out in the sun on a hot summer day, your feet will get a bit stuffy. In fact the fabric is woven tight enough that I wear them in the winter and in the rain, and don't get too cold or wet. So I do wish they made a more breathable version for summer time use.
All that being said, these are still the best pair of shoes I've ever had. Ultra light weight, comfortable, and can be worn all day long without feeling any fatigue whatsoever.
---
UPDATE: It's been 1 year and 9 months, and the soles on these shoes are fully worn out and ready for replacement. Considering I've put between 1,000-2,000 miles of walking in these, that's pretty good. If anyone from Feethit is reading this, here are my top suggestions to perfect this shoe:
1) Easy fix - change the tread pattern. The current pattern causes suction cup effect on hard floors until it starts to wear down. Simply add some gaps in the circle pattern in the tread and it will remedy that issue.
2) Most importantly, put a thin piece of durable rubber on the bottom of the sole. The sole does wear down after some time and lose traction, especially on smooth wet floors (e.g. in the rain, in a kitchen, etc.). A thin piece of durable rubber would add more traction and also extend the life of the cushion-like sole (which is fantastic, don't change it!). This would easily be worth an extra $5-$10 in the price.
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Reviewed in the United States on August 4, 2023
★★★★★ 4
Nice shoes, despite the squeak and inconsistent sizing
Size: 12, Color: Black White 05
Excellent shoes at this price point. Quite comfortable. They do tend to have a nasty squeak on tile floors, sort of like a suction cup being engaged and disengaged.
I bought the navy blue and went back and bought the black. I have to say that the size varied greatly. With the second pair, I have to be sure to wear thin socks and even then, I struggle to get them on, despite having an extremely narrow foot. I'm not sure that a person with an average width foot could wear them. Buyer beware. You may need to go up a size.
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Reviewed in the United States on February 13, 2026
★★★★★ 5
My second pair and what they look like after 2 years
Size: 10.5, Color: New Black05, Size: 10.5, Color: New Black05
I wanted to write a review on these shoes. This is my second purchase. I bought the first pair 2 years ago and the bottoms started wearing out, after all it was 2 years. I read reviews saying that they did not hold up well. My pictures show before and after. The reason I purchased again is because I am impressed with the quality and comfort for the money.
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Reviewed in the United States on May 9, 2026