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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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Description
Wehrli 20-24 Chevrolet 6.6L L5P Duramax 3.5in Intake Horn w/PCV Port - WCFab Red3. 5 in. Turbo Intake Horn for the 2020 2024 L5P Duramax with factory style Turbo. The OEM plastic intake horn is 2. 4 in. diameter and we experienced a 25HP Gain with our 3. 5 in. Horn when used with a Max Effort Tune. Tuning not required, this horn will work plug and play tuners or OEM calibration. This Part Fits: Year Make Model Submodel 2021 2024 Chevrolet Silverado 2500 HD Custom 2020 2024 Chevrolet Silverado 2500 HD High Country 2020 2024
3.5 in. Turbo Intake Horn for the 2020-2024 L5P Duramax with factory style Turbo. The OEM plastic intake horn is 2.4 in. diameter and we experienced a 25HP Gain with our 3.5 in. Horn when used with a Max Effort Tune. Tuning not required, this horn will work plug and play tuners or OEM calibration.This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2021-2024 | Chevrolet | Silverado 2500 HD | Custom |
| 2020-2024 | Chevrolet | Silverado 2500 HD | High Country |
| 2020-2024 | Chevrolet | Silverado 2500 HD | LT |
| 2020-2024 | Chevrolet | Silverado 2500 HD | LTZ |
| 2020-2024 | Chevrolet | Silverado 2500 HD | WT |
| 2024 | Chevrolet | Silverado 2500 HD | ZR2 |
| 2020-2024 | Chevrolet | Silverado 3500 HD | High Country |
| 2020-2024 | Chevrolet | Silverado 3500 HD | LT |
| 2020-2024 | Chevrolet | Silverado 3500 HD | LTZ |
| 2020-2024 | Chevrolet | Silverado 3500 HD | WT |
| 2020-2024 | GMC | Sierra 2500 HD | AT4 |
| 2024 | GMC | Sierra 2500 HD | AT4X |
| 2020-2021 | GMC | Sierra 2500 HD | Base |
| 2020-2024 | GMC | Sierra 2500 HD | Denali |
| 2024 | GMC | Sierra 2500 HD | Denali Ultimate |
| 2022-2024 | GMC | Sierra 2500 HD | Pro |
| 2020-2024 | GMC | Sierra 2500 HD | SLE |
| 2020-2024 | GMC | Sierra 2500 HD | SLT |
| 2020-2024 | GMC | Sierra 3500 HD | AT4 |
| 2020-2021 | GMC | Sierra 3500 HD | Base |
| 2020-2024 | GMC | Sierra 3500 HD | Denali |
| 2024 | GMC | Sierra 3500 HD | Denali Ultimate |
| 2022-2024 | GMC | Sierra 3500 HD | Pro |
| 2020-2024 | GMC | Sierra 3500 HD | SLE |
| 2020-2024 | GMC | Sierra 3500 HD | SLT |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
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- Final sale items are not eligible for returns or exchanges.
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4.3 ★★★★★
Based on 886 reviews
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Product Reviews
★★★★★ 5
What you see is what you get!
Color: 01-black, Size: Large
Fits great, fabric is amazing, turtle neck fits tight, and the quality is amazing!
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Reviewed in the United States on February 11, 2026
★★★★★ 4
A true turtleneck that retains a snug high neck.
Color: White, Size: X-Large
I've found this brand to have gotten better over the years as far as offering the American market what it needs in terms of realistic sizing. I only wish they'd realize that there are a lot of us who are long in the back and arms where my only choice is to go a size up and sacrifice a slim fit for sleeves that are long enough plus a back that doesn't go up past my waist just because I reach up for something, that and I like to be warm. So these are such nice quality turtlenecks that it's hard to complain about but maybe the company will read this. The snug neck stays up is plus number one since that's why I'm buying a full neck. They come with very nice weaves in the fabric, good enough for casual or formal wear. Finally the warmth you seek is there but I've worn them in what most would think isn't the right temp for a turtleneck. Also they have them in white! Yes, a lot of others just don't for reasons I can't fathom, and the pic you're seeing is accurate, these will form to your shape without being ridiculously thin material. Several washes later and they are as fine a garment as when I first wore them. I've only found one other brand that compares to these but it's much more expensive, COOFANDY is affordable in these times of expensive everything. Warm but also a lightweight shirt, I've gotten them really dirty with actual dirt and it washes out so well you'd never know it. Don't let my taking off one star stop you, try one yourself and you'll be coming back for more.
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Reviewed in the United States on July 30, 2025
★★★★★ 5
Quality,warmth and fit
Color: Royal Blue, Size: Small
Really top quality. This is my 4th purchase of these Really great sweaters.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
Nice Sweater
Color: 01-black, Size: Large
This is a very nice sweater. It’s reasonably thick and warm. Looks nice. I like it.
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Reviewed in the United States on January 18, 2026
★★★★★ 5
Nice turtle neck sweater
Color: Royal Blue, Size: Small
It was true to size a perfect fit and the color is beautiful. Nice sweater for the amount paid.
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Reviewed in the United States on January 11, 2026
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