2021 GMC Sierra 2500 HD Power Upgrade Parts
223 parts verified to fit your 2021 GMC Sierra 2500 HD for a complete power upgrade. An advanced project — estimated 4-12 hours.
Turbo & Supercharger Kits
(48)primary
Fleece Performance
Fleece Performance 17-23 GM 2500/3500 6.6L L5P Duramax 63mm Cheetah Turbocharger
$2610.11
K&N
K&N 20-23 Chevrolet Silverado 2500/3500 V8-6.6L Diesel Charge Pipe Kit
$419.99
Wehrli
Wehrli 20-24 Chevrolet 6.6L L5P Duramax Passenger Side 3.5in Intercooler Pipe - WCFab Red
$419.84
aFe
aFe 20-23 GM Diesel Trucks V8 6.6L L5P BladeRunner 3.5in Aluminum Cold Charge Pipe - Black
$330.75
Wehrli
Wehrli 20-24 Chevrolet 6.6L L5P Duramax Driver Side 3in Intercooler Pipe - WCFab Red
$378.88
BD Diesel
BD Diesel 20-23 Chevy/GM 2500/3500 L5P Duramax 6.6L Reman. Turbo
$2550.81
BD Diesel
BD Diesel 17-21 Chevy/GM L5P Duramax 6.6L Screamer Turbo
$4054.69
Snow Performance
Snow Performance Chevy/GMC Stg 2 Boost Cooler Water Inj. Kit (SS Brded Line/4AN Fittings) w/o Tank
$937.51
Cold Air Intakes
(120)companion
K&N
K&N 20-25 Chevrolet Silverado 2500/3500 HD V8 6.6L NextGen Cold Air Intake
$425.99
Airaid
Airaid Intake Kit Chevy/GMC 2500/3500 V8-6.6L DSL 20-24 Cotton Gauze and Synthetic Filter Material
$367.99
Airaid
Airaid Intake Kit Chevy/GMC 2500/3500 V8-6.6L DSL 20-22 Synthetic Filter Material
$367.99
aFe
aFe Momentum GT PRO DRY S Intake System 2020 GM Diesel Trucks 2500/3500 V8-6.6L (L5P)
$435.00
Wehrli
Wehrli 20-24 Chevrolet 6.6L L5P Duramax 4in Intake Kit - Red
$715.78
Banks Power
Banks Power 20-22 Chevy/GMC 2500/3500 L5P 6.6L Ram-Air Intake System
$506.88
aFe
aFe Momentum HD Intake System w/ Pro 10R Filter 2020 GM Diesel Trucks 2500/3500 V8-6.6L (L5P)
$420.00
Wehrli
Wehrli 20-24 Chevrolet 6.6L Duramax L5P Stage 3 High Flow Intake Bundle Kit - Bengal Blue
$1930.24
Performance Exhaust
(9)companion
Borla
Borla 20-22 Chevrolet/GMC Silverado/Sierra 6.6L T-304 SS Cat-Back S-Type Exhaust - Brushed
$1324.99
aFe
aFe Apollo GT Series 4in 409SS Cat-Back 20-21 GM 2500/3500HD V8-6.6L L8T - Black Tip
$820.00
aFe
aFe Apollo GT Series 3in 409SS Cat-Back Exhaust w/ Polished Tip 2020 GM 2500/3500HD V8 6.6L L8T
$704.00
Borla
Borla 20-22 Chevrolet/GMC Silverado/Sierra 6.6L T-304 SS Cat-Back S-Type Exhaust - Brushed
$1347.99
Magnaflow
MagnaFlow 2022+ GM 2500/3500HD 6.6L Gas Single Passenger Side Rear Exit Cat-Back Exhaust
$1407.90
aFe
aFe Apollo GT Series 3in 409SS Cat-Back Exhaust w/ Black Tip 2020 GM 2500/3500HD V8 6.6L L8T
$773.00
aFe
aFe 20-23 GM 2500/3500HD V8 6.6L L8T Apollo GT Series 4in 409 SS Cat-Back Exhaust System
$750.00
Banks Power
Banks Power 20-21 Chevy/GMC 2500/3500 6.6L Monster Exhaust System - Black Tip
$727.22
Oil & Fluids
(46)consumable
LIQUI MOLY
LIQUI MOLY 205L Special Tec AA Motor Oil SAE 5W30
$1525.02
LIQUI MOLY
LIQUI MOLY 1L Brake Fluid SL6 DOT 4
$65.86
K&N
K&N 2011+ Buick Enclave 3.6L V6 / 2014+ Chevrolet Silverado 1500 5.3L V8 Spin-On Oil Filter
$10.99
LIQUI MOLY
LIQUI MOLY 1L Brake Fluid DOT 4
$66.14
LIQUI MOLY
LIQUI MOLY 5L Special Tec AA Motor Oil SAE 5W30
$145.98
Royal Purple
Royal Purple Duralec Super Diesel 5W40 CK-4 Motor Oil - 6 Gallon Bag-In-Box
$198.25
Royal Purple
Royal Purple Max Gear Synthetic 75W90 Gear Oil - 1 Quart
$107.94
LIQUI MOLY
LIQUI MOLY 205L Special Tec AA Motor Oil SAE 5W40 Diesel
$1979.80
Power Upgrade for Other GMC Sierra 2500 HD Years
Other Jobs for Your 2021 GMC Sierra 2500 HD
Frequently Asked Questions
What parts do I need for a power upgrade on my 2021 GMC Sierra 2500 HD?
A complete power upgrade on the 2021 GMC Sierra 2500 HD typically requires turbo & supercharger kits, cold air intakes, performance exhaust, oil & fluids. All parts shown on this page are verified to fit your specific vehicle.
How long does a power upgrade take on a 2021 GMC Sierra 2500 HD?
A power upgrade typically takes 4-12 hours and is rated as advanced difficulty. Actual time may vary depending on your experience and the specific parts being replaced.
Can I do a power upgrade myself?
A power upgrade is an advanced project that typically requires specialized tools and significant mechanical experience. Many people choose to have a professional handle this job, but DIYers with the right skills and tools can save significantly on labor.
Are these parts guaranteed to fit my 2021 GMC Sierra 2500 HD?
Yes, all parts on this page are verified to fit the 2021 GMC Sierra 2500 HD using VCDB fitment data from manufacturers. Our fitment information is cross-referenced with industry-standard vehicle databases to ensure accuracy.
What brands make power upgrade parts for the 2021 GMC Sierra 2500 HD?
We carry power upgrade parts from trusted brands including Fleece Performance, K&N, Wehrli, aFe, and BD Diesel. Filter by brand to find your preferred manufacturer.
How much does a power upgrade cost for a 2021 GMC Sierra 2500 HD?
The cost of a power upgrade for the 2021 GMC Sierra 2500 HD depends on the parts and brands you choose. Browse the parts on this page to see current pricing. Doing the work yourself saves significantly on labor costs.