- Home »
- Catalog
Wehrli Custom Fabrication - WCFab » 2021, Chevrolet / GMC, 6.6L Duramax
Products for:
- Year: 2021
- Make: Chevrolet / GMC
- Model: 6.6L Duramax
View Universal items for: 2021 Chevrolet / GMC 6.6L Duramax
Browse Products
Description: - Gasket Kit for 2017-2023 L5P / 2019+ L5D Duramax OEM/VGT Turbos
Item #: WCF100178
Condition:
New
In stock. Ships in 3-5 business days.
Price: $145.00
Description: - Replacement injector wire harness pigtail
- Addresses common failure point associated with DTC (P0201-P0208)
- Available individually or in sets of 4 or 8
- Buy more and save!
Item #: FPE-HAR-L5P-INJ-PT, FPE-HAR-L5P-INJ-PT-4P, FPE-HAR-L5P-INJ-PT-8P
Condition:
New
Price: $59.99
Description: - Airflow to support 700HP*
- *Up to 650 RWHP with Emissions Compliant Tuning and Basic Supporting Mods
- 41 psi Boost @ Sea Level
- Custom Billet 64mm 11-Blade Compressor Wheel - Lightweight...More Details »
Item #: DM1JK1070203000 (2017-2019), DM1MO1070203000 (2020-2023)
Condition:
New
Raw in stock and ships in 3-5 business days. 10-15 business day lead time on powder coat.
This Product cannot ship to the state of California
Price: $3,100.00
Description: - Airflow to support 800HP*
- *Up to 650 RWHP with Emissions Compliant Tuning and Basic Supporting Mods
- HFV (High Flow Vane) Technology - Custom Vane/Nozzle Ring Assembly
- Taller and Wider...More Details »
Item #: DM1JK1070303000, DM1MO1070303000
Condition:
New
Raw in stock and ships in 3-5 business days. 10-15 business day lead time on powder coat.
This Product cannot ship to the state of California
Price: $3,500.00
Sale: $2,975.00
Save: 15%
Save: $525.00
Description: - Proven to support up to 625 RWHP with stock emissions
- Gain +50hp without any tuning installed on the vehicle
- Works great with box tuners, custom tuning, or without tuning
- Lower average...More Details »
Item #: DM1JK1070103000, DM1MO1070103000
Condition:
New
Raw in stock and ships in 3-5 business days. 10-15 business day lead time on powder coat.
This Product cannot ship to the state of California
Price: $1,950.00
Description: - ARP 2000 Material
- 220,000 PSI Tensile Strength
- Chrome-moly Steel, 12-Point Nuts
- Parallel-Ground Washers Included
- Black Oxide Finish
- Sold as a kit
- Made in USA
Item #: 230-4301
Condition:
New
Price: $745.00
Description: - ARP Custom Age 625+ Material
- 260,000 PSI Tensile Strength
- Chrome-moly Steel, 12-Point Nuts
- Parallel-Ground Washers Included
- Sold as a kit
- Made in USA
Item #: 230-4302
Condition:
New
Price: $1,995.00
Description: - Fully TIG Welded 11 GA Stainless Steel Construction
- Heavy Duty 2" Driver Side Up Pipe
- Heavy Duty 2" Passenger Side Up Pipe
- Up Pipe Gaskets (4)
- Flows 26% Better than OEM
- NO TUNING REQUIRED
- Made in USA
Item #: WCF100624
Condition:
New
In Stock. Ships in 3-5 business days.
This Product cannot ship to the state of California
Price: $689.00
Description: - MAP Sensor Weld Fitting / Bung for Custom Fabricated Intercooler Piping
- CNC Machined Billet Aluminum
- Made in USA
Item #: WCF205-34
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $29.00
Description: - CNC Machined Billet Aluminum Plug
- Black anodized finish with engraved logo
- NO Tuning required, bolt on!
- Will fit on stock truck no other modifications or upgrades necessary!
Item #: WCF100473
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $31.00
Description: - Fully TIG Welded, CNC machined billet steel exhaust manifolds
- Finished in Black Ceramic Coat rated for 1800ºF
- Includes new gaskets for manifold to cylinder head, EGR flange, and manifold...More Details »
Item #: WCF100226
Condition:
New
In Stock. Ships in 3-5 business days.
This Product Cannot Ship to the State of California
Price: $2,159.00
Description: - Fully TIG Welded, CNC machined billet steel exhaust manifolds
- Finished in Black Ceramic Coat rated for 1800ºF
- Includes new gaskets for manifold to cylinder head, EGR flange, and manifold...More Details »
Item #: WCF100373
Condition:
New
In Stock. Ships in 3-5 business days.
This Product cannot ship to the state of California
Price: $1,574.00
NEW!
Description: - Flows 27% Better than Stock!
- True 4" Inlet Turbo Intake with smooth flowing transition to strategically designed anti-surge face which properly engages into turbo compressor cover for...More Details »
Item #: WCF100775
Condition:
New
WCFab Red and WCFab Grey in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
This Product cannot ship to the state of California
Price: $259.00
In Stock. Ships in 3-5 business days.
Price: $15.00
Description: - Direct Replacement for OEM Thermostat Housing
- Custom Powder Coat Finish
- Cleans up engine bay appearance
- Completes the look when also running one of our Upper Coolant Pipes
Item #: WCF100188
Condition:
New
WCFab Red, WCFab Grey, Candy Teal, Bengal Red, Gloss White, and Gloss Black in stock and ships in 3-5 business days. 10-15 business day
lead time on other colors.
Price: $179.00
Description: ARP Up Pipe Bolt kit for 2017+ Duramax. 12 Washers and Bolts for installing both up pipes. Includes ARP Lube
Item #: WCF100199
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $60.00
In Stock. Ships in 3-5 business days.
Price: $153.00
Description: - 3.5" Steel Down Pipe
- High Temp Black Ceramic Coat Finish
- Heat Wrap Pre-installed
- Catalyst Back - Emissions Compliant
- NO TUNING REQUIRED!
- Made in USA
Item #: WCF100129
Condition:
New
In Stock. Ships in 3-5 business days.
This Product cannot ship to the state of California
Price: $335.00
Description: The Alpha Series Bumper line is now available for the 2019+ Silverado 4500, 5500, and 6500 trucks. This winch-ready bumper comes standard with 4" light bar cutouts and our signature pockets for...More Details »
Item #: KELDERMAN GM MD ALPHA FRNT
Condition:
New
Please Call for Availability
This product is only Available for Purchase and Installation Through Our Performance Shop.
Description: Get some added protection for the front of your Silverado with a Kelderman Bravo Series Bumper. Available with light bar cutouts and optional clevis hook mounts.
- Modular 3-Piece Design
- Low...More Details »
Item #: KELDERMAN GM MD BRAVO FRNT
Condition:
New
Please Call for Availability
This product is only Available for Purchase and Installation Through Our Performance Shop.
Description: A strong, durable option for the front end of your Silverado with seemingly endless possibilities for customization.
- Modular 3-Piece Design
- Low Profile
- Optional Clevis Hooks
- Optional...More Details »
Item #: KELDERMAN GM MD DELTA FRNT
Condition:
New
Please Call for Availability
This product is only Available for Purchase and Installation Through Our Performance Shop.
Description: - Full length 11G steel c-channel frame rail extensions
- Three full width crossmembers
- Eight bed mounting points
- Front and rear bolt points to chassis
- Made in USA
- Available as a DIY...More Details »
Item #: WCF100627
Condition:
New
10-15 Business Day Lead Time
Ships truck freight. Shipping address must be commercial address with access to a forklift to unload or nearest freight hub for pick up. Will Call Pickup at our facility is also available.
Price: $995.00
Description: - EMISSIONS INTACT Custom Performance Tuning
- Add up to +125 RWHP & +240 lb/ft TQ to your Duramax
- Single Tune Options Available:
- Heavy Tow (8K lbs to GVWR)- +40 RWHP, +72 ft-lbs
- Light...More Details »
Item #: DT1180030001000
Condition:
New
This Product cannot ship to the state of California
Free Ground Shipping
Price: $600.00
Description: Get more done with one haul and enjoy the road while doing it by adding a Kelderman 4-Link Rear Air Suspension!
- Replaces stiff factory leaf springs
- Soaks up harsh bumps and jarring bounces...More Details »
Item #: KELDERMAN 20+ GM +2 RR AIR SUS
Condition:
New
Please Call for Availability
This product is only Available for Purchase and Installation Through Our Performance Shop.
Description: Get more done with one haul and enjoy the road while doing it by adding a Kelderman 4-Link Rear Air Suspension!
- Replaces stiff factory leaf springs
- Soaks up harsh bumps and jarring bounces...More Details »
Item #: KELDERMAN 20+ GM RR AIR SUS
Condition:
New
Please Call for Availability
This product is only Available for Purchase and Installation Through Our Performance Shop.
Description: No leaf springs, no problem. Let Kelderman's 6-8" 4-Link Rear Air Suspension Lift Kit take the bouncing out of your ride and the squatting suspension out of towing.
- Replaces stiff factory leaf...More Details »
Item #: KELDERMAN 20+ GM 6-8 RR AIR SUS
Condition:
New
Please Call for Availability
This product is only Available for Purchase and Installation Through Our Performance Shop.
Description: - 3-Piece Modular Design
- Standard & Wide Versions Available for Use with Stock and Aftermarket Fender Flares
- Optional Clevis Hooks
- Optional LED Lights
- Optional Parking Sensor Mounting Holes
Item #: KELDERMAN 20+ GM DELTA RR
Condition:
New
Please Call for Availability
This product is only Available for Purchase and Installation Through Our Performance Shop.
Description: - 3-Piece Modular Design
- Standard & Wide Versions Available for Use with Stock and Aftermarket Fender Flares
- Optional Clevis Hooks
- Optional LED Lights
- Optional HD Winch Mount
- Optional Parking Sensor Mounting Holes
Item #: KELDERMAN 2-+ GMC DELTA FRNT
Condition:
New
Please Call for Availability
This product is only Available for Purchase and Installation Through Our Performance Shop.
Description: - 3-Piece Modular Design
- Standard & Wide Versions Available for Use with Stock and Aftermarket Fender Flares
- Optional Clevis Hooks
- Optional LED Lights
- Optional HD Winch Mount
- Optional Parking Sensor Mounting Holes
Item #: KELDERMAN 20+ CHEVY DELTA FRNT
Condition:
New
Please Call for Availability
This product is only Available for Purchase and Installation Through Our Performance Shop.
Description: - Headlights: 2x (One Pair) 2020-2023 Silverado 2500/3500 HD XB Hybrid Headlights
- Functions: DRL (White), Turn, Parking, Low, High
- Wiring: Plug and Play Harness, Fuse Tap
- Input: GM...More Details »
Item #: LF546
Condition:
New
Price: $1,200.00
Description: - Headlights: 2x (One Pair) 2020-2023 Silverado HD XB LED Headlights
- Functions: DRL (White), Turn, Parking, Low, High
- Wiring: Plug and Play Harness, Fuse Tap
- Input: GM Multi-Pin OEM
-...More Details »
Item #: LF547
Condition:
New
Price: $1,800.00
Description: Adds up to +81 hp, +144 lb-ft
6 power levels adjustable on-the-fly. Interfaces with OBD-II (On-Board Diagnostics) to communicate with the vehicle's ECM. AutoRate uses vehicle data to adjust tune...More Details »
Item #: 67103
Condition:
New
Price: $889.00
Description: Adds up to +81 hp, 144 lb-ft
6 power levels adjustable on-the-fly. Interfaces with OBD-II (On-Board Diagnostics) to communicate with the vehicle's ECM. AutoRate uses vehicle data to adjust tune in...More Details »
Item #: 67102
Condition:
New
Price: $769.00
Description: - 5" aluminized steel constant-diameter DPF-back exhaust system.
- 15% reduction in exhaust temperature 2 feet behind the tip during regen
- Huge patented 6.5" x 7.5" ob-round slash-cut exhaust...More Details »
Item #: 49809, 49809-B
Condition:
New
CARB E.O. Not Required
Price: $648.00
Description: - 5" aluminized steel constant-diameter DPF-back exhaust system.
- 15% reduction in exhaust temperature 2 feet behind the tip during regen
- Huge patented 6.5" x 7.5" ob-round slash-cut exhaust...More Details »
Item #: 48997, 48997-B
Condition:
New
CARB E.O. Not Required
Price: $628.20
Description: - GM Allison 10L1000 Valve Body Performance Shift Kit
- Improved adjustable shift firmness
- Lower Transmission Temperatures - Bypasses internal thermostat reducing fluid flow restriction to the...More Details »
Item #: RT-A10L-PR
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $79.95
Description: - EMISSIONS INTACT Custom Performance Tuning
- Add up to +150 RWHP & +270 lb/ft TQ to your Duramax
- Single Tune Options Available:
- Heavy Tow (8K lbs to GVWR)- +40 RWHP, +72 ft-lbs
- Light...More Details »
Item #: DT1160030001002
Condition:
New
25% Off SOTF ECM Tune now through December 6th!
This Product cannot ship to the state of California
Free Ground Shipping
Price: $600.00
Description: - Pre-Tuned T93 TCM for 10 Speed Allison 10L1000 Transmission
- Select Mild or Aggressive Shift Points
- Better Acceleration
- Quicker Shifts
- Prevents short shifting in performance use
-...More Details »
Item #: DM1MO1372082000
Condition:
New
This Product cannot ship to the state of California
Price: $775.00
Description: Torsion Bar Keys for 2020-2023 GM 2500HD / 3500HD 2WD/4WD trucks.
Item #: 110-90771
Condition:
New
Price: $139.95
Description: - Front Shock (Single)
- For Leveled Trucks with 1.5" to 2.5" of Front Lift
Item #: 985-24-240
Condition:
New
Price: $219.95
Description: - Front Shock (Single)
- For Stock Height Trucks with 0" to 1" of Front Lift
Item #: 985-24-238
Condition:
New
Price: $219.95
Description: - Rear Shock (Single)
- For Stock Height Trucks with 0" to 1" of Rear Lift
Item #: 985-24-239
Condition:
New
Price: $219.95
Description: - Front Shock (Single)
- For Leveled / Lifted Trucks with 1.5" to 3.0" of Rear Lift
Item #: 985-24-241
Condition:
New
Price: $219.95
Description: - Front Shock (Single)
- For Stock Height Trucks with 0" to 1" of Front Lift
Item #: 985-24-242
Condition:
New
Price: $339.95
Description: - Front Shock (Single)
- For Leveled Trucks running Aftermarket Upper Control Arms such as Cognito or Kryptonite and 1.5" to 2.5" of Front Lift
Item #: 985-24-244
Condition:
New
Price: $339.95
Description: - Rear Shock (Single)
- For Stock Height Trucks with 0" to 1" of Rear Lift
Item #: 985-24-243
Condition:
New
Price: $339.95
Description: - Rear Shock (Single)
- For Lifted Trucks with 1.5" to 3" of Rear Lift
Item #: 985-24-245
Condition:
New
Price: $339.95
Description: - Complete direct bolt in CV driveline
- 1310 series u-joint double cardan CV
- 1330 u-joint at differential
- Lift Height: 4-Inch 7-Inch and 10-Inch
- 0.25-hour DIY install time
- Made in the USA
Item #: 210-90983
Condition:
New
Price: $699.95
Description: - Minimizes air restriction and flow better than stock
- Fully enclosed airbox that protects the filter from dirt and keeps out engine heat
- Snap-In lid design requires no screws to secure it to the box
Item #: 75-5136, 75-5136D
Condition:
New
This Product Cannot Ship to the State of California
Price: $349.00
Description: - Designed specifically to work with GM's MultiPro tailgate
- Lock it in your receiver, stow the ball assembly underneath, and you're free to use the inner-gate and step feature of your MultiPro tailgate
Item #: TS20066BMP, TS20067BMP
Condition:
New
Price: $389.00
Description: - Easy Installation
- No trimming is required to install if leaving off the factory mud guards
- All necessary installation hardware
- Powder-coated semi-gloss black
- 30-minute DIY install time
- Made in the USA
Item #: 110-91193
Condition:
New
Price: $99.95
Description: 2" Economy Leveling Kit for 2020-2023 GM 2500HD / 3500HD 2WD/4WD trucks.
- Yields 2 Inches of front lift
- Forged steel torsion bar adjuster keys
- 1/2 Inch Extenders for OEM front shocks
-...More Details »
Item #: 110-90776
Condition:
New
Price: $159.95
Description: 2" Economy Leveling Lift Kit for 2020-2023 GM 2500HD / 3500HD 2WD/4WD trucks.
- Yields 2 Inches of Front Lift
- Front Shock Spacer kit
- Torsion Bar Keys
- 1 inch Block and U Bolt Kit
-...More Details »
Item #: 110-90800
Condition:
New
Price: $339.95
Description: - Fits 2020+ L5P Duramax Short Bed Trucks
- Increase fuel filter capacity and amount of time between filter changes
- Anodized billet aluminum fuel filter base
- Installs in the same location as the stock cartridge filter base
Item #: WCF100362
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $245.00
Description: - Allows for removal of the stock rear bumper
- Easy installation with basic hand tools
- All necessary hardware included
- Hidden 2.5" Receiver Hitch Sold Separately
Item #: BHP5006
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $795.00
Description: ***For Regular Cab Long Bed, Double Cab Short Bed and Crew Cab Short Bed Models***
-LIFETIME WARRANTY against bending or breaking (to original purchaser)
-60" Heavy Duty Bars
-Poly Bushings...More Details »
Item #: WCF100826
Condition:
New
WCFab Red with Standard Brushed Tag, Gloss Black with Standard Brushed Tag, and Gloss White with Standard Brushed Tag in stock and
ships in 3-5 business days. 10-15
business day lead time on other colors.
Price: $989.00
Description: ***For Double Cab Long Bed and Crew Cab Long Bed Models***
-LIFETIME WARRANTY against bending or breaking (to original purchaser)
-68" Heavy Duty Bars
-Poly Bushings
-RockJock Johnny Joints...More Details »
Item #: WCF100876
Condition:
New
WCFab Red, Gloss Black, and Gloss White in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
Price: $989.00
Description: - Includes Axle side bolt on and Frame side weld on mounts
- Grade 8 Hardware
- This part number is mounting hardware only - Bars not included
- Powder Coating with zinc primer base coat on axle side mounts
Item #: WCF100831
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $274.00
Description: - Pairs with BHP 20+ GM HD Roll Pan BHP5006 (Chevy) and BHP5007 (GMC)
- Built-in mounting bracket for factory trailer plug
- Class 4+ Receiver
- SAE J684-05 certified
- Complete bolt in design...More Details »
Item #: BHP1045, BHP1046
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $529.00
Description: - Pairs with BHP 20+ GM HD Roll Pan BHP5006 (Chevy) and BHP5007 (GMC)
- Built-in mounting bracket for factory trailer plug
- Class 4+ Receiver
- SAE J684-05 certified
- Complete bolt in design...More Details »
Item #: BHP1037, BHP1038
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $529.00
