48+ 2021 GMC Sierra 2500 HD Turbo & Supercharger AT4 Parts

AT4 · Turbo & Supercharger (48 products)

Exact-fit parts for the 2021 GMC Sierra 2500 HD AT4.

Fleece Performance

Part # FPE-L5P-VNT63-1723

Confirmed Fit

Fleece Performance 17-23 GM 2500/3500 6.6L L5P Duramax 63mm Cheetah Turbocharger

$2610.11

BD Diesel

Part # 1045846

Confirmed Fit

BD Diesel 20-23 Chevy/GM 2500/3500 L5P Duramax 6.6L Reman. Turbo

$2719.68

Banks Power

Part # 26005

Confirmed Fit

Banks Power 2020 GM 2500/3500 6.6L L5P Boost Tube Upgrade Kit - Red

$808.03

Wehrli

Part # WCF100365-RED

Confirmed Fit

Wehrli 20-24 Chevrolet 6.6L L5P Duramax Driver Side 3in Intercooler Pipe - WCFab Red

$378.88

aFe BladeRunner Black 3in Aluminum Charge Pipe Kit 20-21 GM Diesel Trucks V8-6.6L (td) L5P

aFe

Part # 46-20444-B

Confirmed Fit

aFe BladeRunner Black 3in Aluminum Charge Pipe Kit 20-21 GM Diesel Trucks V8-6.6L (td) L5P

$718.34

BD Diesel

Part # 1045630

Confirmed Fit

BD Diesel 17-22 Chevy/GMC 2500/3500 Duramax 6.6L Turbo Intake Horn

$171.01

Wehrli

Part # WCF100381-RED

Confirmed Fit

Wehrli 20-24 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - WCFab Red

$419.84

aFe 20-23 GM Diesel Trucks V8 6.6L L5P BladeRunner 3in Aluminum Hot Charge Pipe - Black

aFe

Part # 46-20448-B

Confirmed Fit

aFe 20-23 GM Diesel Trucks V8 6.6L L5P BladeRunner 3in Aluminum Hot Charge Pipe - Black

$437.76

Snow Performance

Part # SNO-430-BRD-T

Confirmed Fit

Snow Performance Chevy/GMC Stg 2 Boost Cooler Water Inj. Kit (SS Brded Line/4AN Fittings) w/o Tank

$946.19

aFe 20-23 GM Diesel Trucks V8 6.6L L5P BladeRunner 3.5in Aluminum Cold Charge Pipe - Black

aFe

Part # 46-20449-B

Confirmed Fit

aFe 20-23 GM Diesel Trucks V8 6.6L L5P BladeRunner 3.5in Aluminum Cold Charge Pipe - Black

$343.55

K&N 20-23 Chevrolet Silverado 2500/3500 V8-6.6L Diesel Charge Pipe Kit

K&N

Part # 77-1011KC

Confirmed Fit

K&N 20-23 Chevrolet Silverado 2500/3500 V8-6.6L Diesel Charge Pipe Kit

$419.99

BD Diesel

Part # 1045844

Confirmed Fit

BD Diesel 17-21 Chevy/GM L5P Duramax 6.6L Screamer Turbo

$4135.90

Wehrli

Part # WCF100381-FB

Confirmed Fit

Wehrli 20-25 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - Flat Black

$394.24

Wehrli

Part # WCF100381-IBB

Confirmed Fit

Wehrli 20-24 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - Illusion Blueberry

$419.84

Wehrli

Part # WCF100381-FTB

Confirmed Fit

Wehrli 20-25 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - Fine Texture Black

$394.24

Wehrli

Part # WCF100365-SC

Confirmed Fit

Wehrli 20-24 Chevrolet 6.6L L5P Duramax Driver Side 3in Intercooler Pipe - Sparkle Copper

$378.88

Wehrli

Part # WCF100365-CT

Confirmed Fit

Wehrli 20-24 Chevrolet 6.6L L5P Duramax Driver Side 3in Intercooler Pipe - Candy Teal

$378.88

Wehrli

Part # WCF100381-BRZ

Confirmed Fit

Wehrli 20-25 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - Brizzle Blue

$394.24

Wehrli

Part # WCF100365-IP

Confirmed Fit

Wehrli 20-24 Chevrolet 6.6L L5P Duramax Driver Side 3in Intercooler Pipe - Illusion Purple

$378.88

Wehrli

Part # WCF100381-BS

Confirmed Fit

Wehrli 20-25 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - Bengal Silver

$394.24

Frequently Asked Questions

Do these parts fit my 2021 GMC Sierra 2500 HD AT4?

This page groups parts listed for the 2021 GMC Sierra 2500 HD AT4. Some products fit every trim, while others depend on submodel, engine, drivetrain, or brake package. Use your trim in My Garage or the product page fitment check to confirm exact fit.

What turbo & supercharger options are available for my 2021 GMC Sierra 2500 HD AT4?

We offer a wide selection of turbo & supercharger parts for the 2021 GMC Sierra 2500 HD AT4. This page narrows the catalog to the year, make, and model; use your trim on product pages to confirm exact fit when a part only fits certain submodels.

What brands make parts for the 2021 GMC Sierra 2500 HD AT4?

We carry parts from trusted brands including Wehrli, Snow Performance, aFe, BD Diesel, and Banks Power, plus many more. Filter by brand to find your preferred manufacturer.

How fast do 2021 GMC Sierra 2500 HD AT4 parts ship?

Most in-stock items ship within 1-2 business days. Shipping rates are calculated at checkout based on your location.

What warranty do your 2021 GMC Sierra 2500 HD AT4 parts come with?

Warranty coverage varies by manufacturer but typically ranges from 1 year to lifetime. Each product page includes specific warranty information from the manufacturer.

2021 GMC Sierra 2500 HD(2,212 parts)

2021 GMC Sierra 2500 HD(2,212 parts)

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Other GMC Sierra 2500 HD Years

AT4 · Turbo & Supercharger (48 products)

Fleece Performance 17-23 GM 2500/3500 6.6L L5P Duramax 63mm Cheetah Turbocharger

BD Diesel 20-23 Chevy/GM 2500/3500 L5P Duramax 6.6L Reman. Turbo

Banks Power 2020 GM 2500/3500 6.6L L5P Boost Tube Upgrade Kit - Red

Wehrli 20-24 Chevrolet 6.6L L5P Duramax Driver Side 3in Intercooler Pipe - WCFab Red

aFe BladeRunner Black 3in Aluminum Charge Pipe Kit 20-21 GM Diesel Trucks V8-6.6L (td) L5P

BD Diesel 17-22 Chevy/GMC 2500/3500 Duramax 6.6L Turbo Intake Horn

Wehrli 20-24 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - WCFab Red

aFe 20-23 GM Diesel Trucks V8 6.6L L5P BladeRunner 3in Aluminum Hot Charge Pipe - Black

Snow Performance Chevy/GMC Stg 2 Boost Cooler Water Inj. Kit (SS Brded Line/4AN Fittings) w/o Tank

aFe 20-23 GM Diesel Trucks V8 6.6L L5P BladeRunner 3.5in Aluminum Cold Charge Pipe - Black

K&N 20-23 Chevrolet Silverado 2500/3500 V8-6.6L Diesel Charge Pipe Kit

BD Diesel 17-21 Chevy/GM L5P Duramax 6.6L Screamer Turbo

Wehrli 20-25 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - Flat Black

Wehrli 20-24 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - Illusion Blueberry

Wehrli 20-25 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - Fine Texture Black

Wehrli 20-24 Chevrolet 6.6L L5P Duramax Driver Side 3in Intercooler Pipe - Sparkle Copper

Wehrli 20-24 Chevrolet 6.6L L5P Duramax Driver Side 3in Intercooler Pipe - Candy Teal

Wehrli 20-25 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - Brizzle Blue

Wehrli 20-24 Chevrolet 6.6L L5P Duramax Driver Side 3in Intercooler Pipe - Illusion Purple

Wehrli 20-25 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - Bengal Silver

Frequently Asked Questions

Do these parts fit my 2021 GMC Sierra 2500 HD AT4?

What turbo & supercharger options are available for my 2021 GMC Sierra 2500 HD AT4?

What brands make parts for the 2021 GMC Sierra 2500 HD AT4?

How fast do 2021 GMC Sierra 2500 HD AT4 parts ship?

What warranty do your 2021 GMC Sierra 2500 HD AT4 parts come with?