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UnderDog Diesel » 2021, Silverado 3500
Products for:
- Year: 2021
- Model: Silverado 3500
View Universal items for: 2021 Silverado 3500
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Description: Tuning Required
Item #: PDW-0623-DMAX-GEK
Condition:
New
Price: $159.99
Electronic Throttle Controller
Description: Pedal Commander throttle response controller with Bluetooth support. You can adjust your gas pedal sensitivity with 36 different modes. It will help your Chevrolet Silverado 3500 HD to accelerate faster!
Item #: PC77
Condition:
New
Price: $299.99
NEW!
Engine Oil Filter
Description: Includes:
-2x PPE GM 6.6L Duramax MicroPure XR® Engine Oil Filter (114000750)
- PPE GM 6.6L Duramax Fuel Coolant Pump Relocation Kit (114002700)
Item #: 114000750 x2 & 114002700
Condition:
New
Limited Supply: Only 0 Left!
Price: $100.00
Exhaust
Item #: 117020200
Condition:
New
Price: $199.99
Sale: $179.99
Save: 10%
Save: $20.00
Exhaust Manifold Kit
Description: Significant reduction in exhaust back-pressure
Lower EGTs, better turbo efficiency and fuel economy
Sil-moly cast iron construction
Two-inch Free-Flow up-pipes with sleeved bellows
Up-pipes...More Details »
Item #: 116112500
Condition:
New
Price: $1,499.99
Sale: $1,349.99
Save: 10%
Save: $150.00
Exhaust Manifold Kit
Description: Significant reduction in exhaust back-pressure
Lower EGTs, better turbo efficiency and fuel economy
Sil-moly cast iron construction
Two-inch Free-Flow up-pipes with sleeved bellows
Up-pipes...More Details »
Item #: 116112520
Condition:
New
Price: $1,689.99
Sale: $1,520.99
Save: 10%
Save: $169.00
Exhaust Manifold Kit
Description: Significant reduction in exhaust back-pressure
Lower EGTs, better turbo efficiency and fuel economy
Sil-moly cast iron construction
Two-inch Free-Flow up-pipes with sleeved bellows
Up-pipes...More Details »
Item #: 116112535
Condition:
New
Price: $1,689.99
Sale: $1,520.99
Save: 10%
Save: $169.00
Engine Oil Pan
Item #: 114052201
Condition:
New
Price: $19.99
Sale: $17.99
Save: 10%
Save: $2.00
Item #: 116112583
Condition:
New
Price: $39.99
Sale: $35.99
Save: 10%
Save: $4.00
Price: $39.99
Sale: $35.99
Save: 10%
Save: $4.00
Suspension Leaf Spring Block Kit
Description: GM 2500HD/3500HD OEM Style 1" Rear Lift Block Kit Fits 2011-2024 GM HD trucks. Includes new longer u-bolts and hardware OEM style cast iron construction.
NOTE: Not intended for vehicles equipped...More Details »
Item #: 66-3111
Condition:
New
Not Available
Suspension Leaf Spring Block Kit
Description: For Use Only on Single Rear Wheel 2500HD trucks that have the factory Trailer Package rear springs. This kit is not compatible with HD trucks equipped with top-mounted overload springs. For Use On...More Details »
Item #: 66-3122
Condition:
New
Not Available
Suspension Lift Kit
Description: Big Lift Kit w/Shocks 6 in. Lift w/Falcon 1.1 Monotube Shock w/o Factory Air
Item #: 44-19601
Condition:
New
Not Available
Suspension Lift Kit
Description: Big Lift Kit w/Shocks 6 in. Lift w/Falcon 1.1 Shocks
Item #: 44-30620
Condition:
New
Not Available
Suspension Lift Kit
Description: Big Lift Kit w/Shocks 6 in. Lift w/Rear Falcon 1.1 Monotube Shocks
Item #: 44-39600
Condition:
New
Not Available
Suspension Lift Kit
Description: Big Lift Kit w/Shocks 6 in. Lift w/SST3000 Shocks
Item #: 44-30601
Condition:
New
Not Available
Suspension Lift Kit
Description: Big Lift Kit w/Shocks 8 in. Lift w/Falcon 1.1 Shocks
Item #: 44-30820
Condition:
New
Not Available
Suspension Lift Kit
Description: Big Lift Kit w/Shocks 8 in. Lift w/SST3000 Shocks
Item #: 44-30801
Condition:
New
Not Available
Suspension Lift Kit
Description: Big Lift Kit w/Shocks 8 in. Lift w/Upper Control Arms Rear Falcon 1.1 Monotube Shocks
Item #: 44-39800
Condition:
New
Not Available
Leaf Helper Spring
Description: Block And Add-A-Leaf Kit 4 in. Blocks Incl. U-Bolts Fits: 2011-15 SILVERADO/SIERRA 2500HD/3500HD-4in. Block kit and U-Bolt
Item #: 26-3204
Condition:
New
Not Available
Leaf Helper Spring
Description: Block And Add-A-Leaf Kit 5 in. Blocks Incl. U-Bolts Fits: 2011-16 SILVERADO/SIERRA 2500HD/3500HD-5in. Block kit and U-Bolt
Item #: 26-3205
Condition:
New
Not Available
Suspension Control Arm
Description: Control Arm Fabricated Upper
Item #: 44-3035
Condition:
New
Not Available
Suspension Leveling Kit
Description: Leveling Kit 2.0 in. Front
Item #: 66-3020
Condition:
New
Not Available
Suspension Leaf Spring Block Kit
Description: Rear Block Kit 1 in. Cast Iron Blocks Incl. Integrated Locating Pin E-Coated U-Bolts Nuts/Washers For Use w/Factory Top Overloads Fits: 2011-16 GM/CHEVY HD 2500 2WD/4WD-1.0in. TALL OEM STYLE...More Details »
Item #: 66-3121
Condition:
New
Not Available
Suspension Leaf Spring Block Kit
Description: Rear Block Kit 2 in. Cast Iron Blocks Incl. Integrated Locating Pin E-Coated U-Bolts Nuts/Washers Fits: 2011-16 GM/CHEVY HD 2500 2WD/4WD-2.0in. TALL OEM STYLE REAR BLOCK KIT. . CAST CONSTRUCTION...More Details »
Item #: 66-3112
Condition:
New
Not Available
Suspension Lift Kit
Description: SST® Lift Kit 3.0 in. Front 2.0 in. Rear
Item #: 69-3030
Condition:
New
Not Available
Suspension Lift Kit
Description: SST® Lift Kit w/Shocks 3.5 in. Front Key Way 2 in. Rear Block Fabricated A-Arm w/ Falcon 1.1 Monotube Shocks
Item #: 69-30350
Condition:
New
Not Available
Suspension Lift Kit
Description: SST® Lift Kit w/Shocks 3.5 in. Front/3.0 in. Rear Lift w/Fabricated Control Arms And Bilstein Shocks
Item #: 69-3035
Condition:
New
Not Available
Cold Air Intake
Item #: 75-5136
Condition:
New
Price: $379.00
Cold Air Intake
Item #: 75-5136D
Condition:
New
Price: $379.00
Fuel Tank
Description: The distance to empty (DTE) on GM trucks can’t be reprogrammed, so it will show about half the mileage that is really left. This occurs with all aftermarket high-capacity fuel tanks.
The fuel...More Details »
Item #: 10-1016-1
Condition:
New
Price: $1,449.00
Fuel Tank
Description: Important Note about the Fuel Gauge Operation:
The distance to empty (DTE) on GM trucks can’t be reprogrammed, so it will show about half the mileage that is really left. You can multiple the...More Details »
Item #: 10-1017
Condition:
New
Price: $1,349.00
Description: For modified trucks only.
Item #: L5P-CP3-10
Condition:
New
This item will dropship from S&S directly. Rough lead time is 5 Business Days.
This product cannot ship to California.
Price: $2,912.00
Description: For modified trucks only.
Item #: L5P-CP3-12
Condition:
New
This item will dropship from S&S directly. Rough lead time is 5 Business Days.
This product cannot ship to California.
Price: $3,406.00
Description: For modified trucks only.
Item #: L5P-CP3-14
Condition:
New
This item will dropship from S&S directly. Rough lead time is 5 Business Days.
This product cannot ship to California.
Price: $3,900.00
Item #: L5P-100-SAC
Condition:
New
This item will dropship from S&S directly. Rough lead time is 5 Business Days.
This product cannot ship to California.
Price: $4,305.60
Item #: L5P-150-SAC
Condition:
New
This item will dropship from S&S directly. Rough lead time is 5 Business Days.
This product cannot ship to California.
Price: $4,903.60
Item #: L5P-200-SAC
Condition:
New
This item will dropship from S&S directly. Rough lead time is 5 Business Days.
This product cannot ship to California.
Price: $5,501.60
Item #: L5P-050-SAC
Condition:
New
This item will dropship from S&S directly. Rough lead time is 5 Business Days.
This product cannot ship to California.
Price: $3,707.60
Description: Replaces the Failure Prone Factory Turbo Coolant Return Tube
-Billet Aluminum
-High Temp O-Ring for leak proof seal.
*Stock Trucks may require modifications to coolant hoses*
Intended for...More Details »
Item #: SRF-L5P-TCF
Condition:
New
Not Available
In stock. Order by 2PM EST for guaranteed same day shipping.
Price: $60.00
Description: Replaces the Failure Prone Factory Turbo Coolant Return Tube
-Billet Aluminum
-High Temp O-Ring for leak proof seal.
-Coolant Rated Hose
*Stock Trucks may require modifications to coolant...More Details »
Item #: SRF-L5P-TCFA-20
Condition:
New
Not Available
In stock. Order by 2PM EST for guaranteed same day shipping.
Price: $75.00
Fuel Tank
Description: Extra Large Midship Tank 56 Gallon
Item #: 7010220
Condition:
New
Price: $1,300.55
Coolant Block-Off Plate
Description: Billet Aluminum
Black Anodized
Viton O-Ring Integrated Seal
Includes New Grade 10.9 Hardware
Machined in the USA
Item #: UDD-DMAX-CBOP
Condition:
New
Price: $50.95
Description: Brand New - No Core Charge
Item #: ZSG7675
Condition:
New
Price: $560.00
Description: Replaces failure prone plastic factory GM Heater Core Firewall Coolant Fitting
Billet direct-fit replacement with 5/8" barb connection
More resistant to heat and vibration
Double O-ring...More Details »
Item #: WCF100155
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $42.00
Sale: $40.74
Save: 3%
Save: $1.26
Description: - CNC Machined Billet Cap is a direct OEM Replacement not a cover
- Includes new diaphragm seal
- Made in USA
- Black Anodized Finish
- Installs in seconds
Item #: WCF100216
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $45.00
Sale: $43.65
Save: 3%
Save: $1.35
Description: - CNC Machined Billet Cap is a direct OEM Replacement not a cover
- Includes new diaphragm seal
- Made in USA
- Clear Anodized Finish
- Installs in seconds
Item #: WCF100215
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $45.00
Sale: $43.65
Save: 3%
Save: $1.35
Description: #NAME?
Item #: WCF206-19
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $51.00
Sale: $49.47
Save: 3%
Save: $1.53
Description: -CNC Machined Billet Aluminum GM factory oil cap filler neck replacement
-Matches WCFab Billet Aluminum Coolant Tank and Brake Reservoir Caps
-Includes o-ring seal
-Machined cam lock
-Black...More Details »
Item #: WCF100443
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $53.00
Sale: $51.41
Save: 3%
Save: $1.59
Description: -CNC Machined Billet Aluminum GM factory oil cap filler neck replacement
-Matches WCFab Billet Aluminum Coolant Tank and Brake Reservoir Caps
-Includes o-ring seal
-Machined cam lock
-Clear...More Details »
Item #: WCF100442
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $53.00
Sale: $51.41
Save: 3%
Save: $1.59
Description: This aluminum panel cleanly finishes the bottom opening of your 2011-2014 Chevy Silverado HD truck bumper when the lower plastic air dam has been removed.
Allows for installation of more...More Details »
Item #: WCF100368
Condition:
New
Raw and Fine Texture Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
Price: $225.00
Sale: $218.25
Save: 3%
Save: $6.75
Description: Fits 2017-2019 Short Bed & Long Bed and 2020-2024 Long Bed (except 2023 & 2024 duallys)
Increase fuel filter capacity and amount of time between filter changes
Anodized billet aluminum fuel...More Details »
Item #: WCF100361
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $255.00
Sale: $247.35
Save: 3%
Save: $7.65
NEW!
Description: - 316 Stainless Steel Casting, Casted and machined in the USA!
- Includes: ARP Bolts (x4) for Turbo to Pedestal
- 12.7% flow increase over OEM!
- Enlarged and port match openings at up pipes and...More Details »
Item #: WCF100185
Condition:
New
In stock and ships in 3-5 business days.
Price: $549.00
Sale: $532.53
Save: 3%
Save: $16.47
Description: -Your Choice of Custom Exergy Sportsman, 10mm, 12mm, or 14mm CP3 pump specific to this kit
-Billet Aluminum, Black Anodized CP3 Pump Mount Plate
-High Pressure Fuel Line
-High Pressure Rail...More Details »
Item #: WCF100455, WCF100456, WCF100457, WCF100458
Condition:
New
In stock. Ships in 3-5 business days.
This Product cannot ship to the state of California
Price: $2,495.00
Sale: $2,420.15
Save: 3%
Save: $74.85
Description: -Mount Bracket
-Zinc primer & Semi gloss black powder coat finish
Item #: WCF100276
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $64.00
Sale: $62.08
Save: 3%
Save: $1.92
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: $150.00
Sale: $145.50
Save: 3%
Save: $4.50
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: $32.00
Sale: $31.04
Save: 3%
Save: $0.96
Item #: WCF100822
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $159.00
Sale: $154.23
Save: 3%
Save: $4.77
Description: Passenger Side Up Pipe
Driver Side Up Pipe
Up Pipe Gaskets (4)
Flows 26% Better than OEM
Made in USA
Item #: WCF100624
Condition:
New
In Stock. Ships in 3-5 business days.
This product cannot ship to California.
Price: $705.00
Sale: $683.85
Save: 3%
Save: $21.15
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, WCFab Grey, Illusion Purple, Gloss Black, and Candy Teal in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
Price: $269.00
Sale: $260.93
Save: 3%
Save: $8.07