Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Wehrli Custom Fab WCF100344-CB 4" Intake Kit W/Air Box - Candy BlueGet the Wehrli Custom Fab WCF100344 CB 4" Intake Kit W Air Box Candy Blue from GAP for your GM 6. 6L Duramax today. This high flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces your diesel's restrictive plastic factory parts for improved engine performance. The new design significantly increases air flow to your turbo, producing improved horsepower and torque, quicker throttle response, and cooler intake
Get the Wehrli Custom Fab WCF100344-CB 4" Intake Kit W/Air Box - Candy Blue from GAP for your GM 6.6L Duramax today. This high-flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces your diesel's restrictive plastic factory parts for improved engine performance. The new design significantly increases air flow to your turbo, producing improved horsepower and torque, quicker throttle response, and cooler intake temperatures by drawing cold air through the hood Ram Air duct and inner fender. All aluminum construction features large diameter 4" piping with smooth aerodynamic bends to improve intake air velocity and volume and provide more aggressive engine and turbo sound during acceleration. High-quality hardware, silicone boot, seals, and stainless-steel t-bolt clamps ensure optimum durability and ease of installation. The removable air box lid element allows for easy visual inspection and maintenance of your WCFab filter with an included hydrophobic pre-filter cover to help keep your MAF sensor, turbo, and engine airways contaminant-free. The critical ram air duct seal has been moved to the bottom of the hood for a clean engine compartment appearance.
Features:
- Candy Blue Powder Coat Finish
- 4" Intake Pipe
- Air Box & Lid Constructed Of 10G Aluminum Sheet
- Dry Air Filter
- Outerwear's Pre-Filter Cover
- Hardware
- Seal For Connection To Ram-Air Port On Hood
- High-Quality Silicone Boot
- Stainless Steel T-Bolt Clamps
- Powder Coating
- Installs Easily With Basic Hand Tools.
- No Tuning Required, Bolt-On
- Compatible With Stock Trucks. No Other Modifications Or Upgrades Necessary!
- Made In USA
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
4.3 ★★★★★
Based on 2128 reviews
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Product Reviews
★★★★★ 5
Same sizes but different fits
Color: Light Green-new, Size: 32W x 32L
Great color and good fit. Feels more like a Jean. I bought two pair-exact same size. 32w x 32 length. Light green was exactly what I wanted. The maroon red was more like a jegging than jeans. Not what I wanted. Supposedly same style - so just be aware fits were completely different!
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Reviewed in the United States on May 1, 2026
★★★★★ 4
Good product with quality-control issues
Color: Dark Grey, Size: 31W x 31L
I really like these jeans. I own them in almost every color they offer, but the manufacturing consistency is hit or miss. The latest pair I bought has a much smaller pocket opening than the others.
I also always order the same size (31×31), but when I got the red pair they were ridiculously long, more like a 31×36.
And the first khaki pair I bought had pockets about half as deep as the rest. My iPhone would literally stick out of them.
That said, for the price and overall look, they’re still a solid buy.
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Reviewed in the United States on February 15, 2026
★★★★★ 5
Comfortable
Color: Deep Brown, Size: 34W x 32L
Nicely fit.
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Just buy. You will want more in different colors
Color: Lemon Yellow, Size: 40W x 32L
Excellent pants. Super comfy
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Reviewed in the United States on May 20, 2026
★★★★★ 5
HIGHLY RECOMMENDED!
Color: Deep Brown, Size: 34W x 32L
It fits so well and true to size. The quality of the fabric is commendable. I will surely buy again.
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Reviewed in the United States on May 20, 2026
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