How long is shipping for Magnaflow?

Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.

How long is shipping for Magnaflow?

Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.

How long is shipping for Magnaflow?

Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.

How long is shipping for Magnaflow?

Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.

How long is shipping for Magnaflow?

Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.

Magnaflow

Magnaflow 4 inch Exhaust Pipe for 2001-2005 Chevy/GMC Duramax Diesel V8 6.6L

Name: Magnaflow 4 inch Exhaust Pipe for 2001-2005 Chevy/GMC Duramax Diesel V8 6.6L
Brand: Magnaflow
SKU: MAG15398
Price: 262.58 USD
Availability: InStock

Roll over image to zoom in Click on image to zoom

Magnaflow

Magnaflow 4 inch Exhaust Pipe for 2001-2005 Chevy/GMC Duramax Diesel V8 6.6L

Save 11%

SKU: MAG15398

No reviews

About Magnaflow MagnaFlow has been America's leader in stainless steel ...Read More

Price:

$262.58 $293.63

Quantity:

Add To Cart

Car Wheel Size Chart

Wheel Diameter (inches)	Tire Width (mm)	Aspect Ratio	Rim Width (inches)
14	185	65	5.5
15	195	60	6.0
16	205	55	6.5
17	215	50	7.0
18	225	45	7.5
19	235	40	8.0
20	245	35	8.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

225 = Tire width in mm
45 = Aspect ratio (height as % of width)
R17 = Rim diameter in inches

Ships FAST in USA

Guaranteed Low Price

GGCRACING Discount

Product Details

Product Description

Part Numbers

Sizing & Fit

About Magnaflow

MagnaFlow has been America's leader in stainless steel performance exhaust since 1981. From the rumbly Pro Street to the OE-quiet Touring series, every MagnaFlow exhaust delivers measurable HP, an unmistakable note, and a lifetime warranty.

Watch in action

MagnaFlow 4-Inch Turbo Downpipe for Duramax Diesel

Enhance the performance and sound of your 2001-2005 Chevrolet Silverado 2500 HD/3500 or GMC Sierra 2500 HD/3500 equipped with the 6.6L Duramax Diesel engine. This MagnaFlow Turbo Downpipe (Part #15398) is meticulously engineered to optimize exhaust flow, delivering noticeable gains in horsepower and torque.

Key Features:

Mandrel Bent Tubing: Features 4-inch diameter, mandrel-bent stainless steel tubing for smooth, unrestricted airflow.
Durable Construction: Crafted from 100% stainless steel for superior corrosion resistance and longevity.
Optimized Performance: Designed to improve exhaust gas scavenging and turbo spool-up, leading to better throttle response.
Precision Manufacturing: Utilizes CNC robotic manufacturing for consistent quality and a perfect fit.

Vehicle Fitment:

This exhaust pipe is compatible with a wide range of 2001-2005 Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and Sierra 3500 models featuring the 6.6L Duramax Diesel engine. Specific submodels include Base, LS, LT, WT, and SLE trims.

Invest in a premium exhaust upgrade that combines aggressive sound with tangible performance benefits. Experience the MagnaFlow difference today at GGCRACING.

Vehicle Fitment

Years	Make	Model	Trim
2001-2005	Chevrolet	Silverado 2500 HD	Base
2001-2005	Chevrolet	Silverado 2500 HD	LS
2001-2005	Chevrolet	Silverado 2500 HD	LT
2003-2005	Chevrolet	Silverado 2500 HD	WT
2001-2005	Chevrolet	Silverado 3500	Base
2001-2005	Chevrolet	Silverado 3500	LS
2004	Chevrolet	Silverado 3500	WT
2001-2002	GMC	Sierra 2500 HD	SL
2001-2005	GMC	Sierra 2500 HD	SLE
2001-2005	GMC	Sierra 2500 HD	SLT
2002-2005	GMC	Sierra 2500 HD	Base
2003-2005	GMC	Sierra 2500 HD	WT
2001-2005	GMC	Sierra 3500	SLE
2001-2005	GMC	Sierra 3500	SLT
2002-2005	GMC	Sierra 3500	Base
2004-2005	GMC	Sierra 3500	WT

Often bought with

Other popular Magnaflow products customers consider together:

Product Details

Product Description

Part Numbers

Sizing & Fit

About Magnaflow

Watch in action

MagnaFlow 4-Inch Turbo Downpipe for Duramax Diesel

Key Features:

Mandrel Bent Tubing: Features 4-inch diameter, mandrel-bent stainless steel tubing for smooth, unrestricted airflow.
Durable Construction: Crafted from 100% stainless steel for superior corrosion resistance and longevity.
Optimized Performance: Designed to improve exhaust gas scavenging and turbo spool-up, leading to better throttle response.
Precision Manufacturing: Utilizes CNC robotic manufacturing for consistent quality and a perfect fit.

Vehicle Fitment:

Invest in a premium exhaust upgrade that combines aggressive sound with tangible performance benefits. Experience the MagnaFlow difference today at GGCRACING.

Vehicle Fitment

Years	Make	Model	Trim
2001-2005	Chevrolet	Silverado 2500 HD	Base
2001-2005	Chevrolet	Silverado 2500 HD	LS
2001-2005	Chevrolet	Silverado 2500 HD	LT
2003-2005	Chevrolet	Silverado 2500 HD	WT
2001-2005	Chevrolet	Silverado 3500	Base
2001-2005	Chevrolet	Silverado 3500	LS
2004	Chevrolet	Silverado 3500	WT
2001-2002	GMC	Sierra 2500 HD	SL
2001-2005	GMC	Sierra 2500 HD	SLE
2001-2005	GMC	Sierra 2500 HD	SLT
2002-2005	GMC	Sierra 2500 HD	Base
2003-2005	GMC	Sierra 2500 HD	WT
2001-2005	GMC	Sierra 3500	SLE
2001-2005	GMC	Sierra 3500	SLT
2002-2005	GMC	Sierra 3500	Base
2004-2005	GMC	Sierra 3500	WT

Often bought with

Other popular Magnaflow products customers consider together:

Product Details

Product Description

About Magnaflow

Watch in action

MagnaFlow 4-Inch Turbo Downpipe for Duramax Diesel

Key Features:

Mandrel Bent Tubing: Features 4-inch diameter, mandrel-bent stainless steel tubing for smooth, unrestricted airflow.
Durable Construction: Crafted from 100% stainless steel for superior corrosion resistance and longevity.
Optimized Performance: Designed to improve exhaust gas scavenging and turbo spool-up, leading to better throttle response.
Precision Manufacturing: Utilizes CNC robotic manufacturing for consistent quality and a perfect fit.

Vehicle Fitment:

Invest in a premium exhaust upgrade that combines aggressive sound with tangible performance benefits. Experience the MagnaFlow difference today at GGCRACING.

Vehicle Fitment

Years	Make	Model	Trim
2001-2005	Chevrolet	Silverado 2500 HD	Base
2001-2005	Chevrolet	Silverado 2500 HD	LS
2001-2005	Chevrolet	Silverado 2500 HD	LT
2003-2005	Chevrolet	Silverado 2500 HD	WT
2001-2005	Chevrolet	Silverado 3500	Base
2001-2005	Chevrolet	Silverado 3500	LS
2004	Chevrolet	Silverado 3500	WT
2001-2002	GMC	Sierra 2500 HD	SL
2001-2005	GMC	Sierra 2500 HD	SLE
2001-2005	GMC	Sierra 2500 HD	SLT
2002-2005	GMC	Sierra 2500 HD	Base
2003-2005	GMC	Sierra 2500 HD	WT
2001-2005	GMC	Sierra 3500	SLE
2001-2005	GMC	Sierra 3500	SLT
2002-2005	GMC	Sierra 3500	Base
2004-2005	GMC	Sierra 3500	WT

Often bought with

Other popular Magnaflow products customers consider together:

Wheel Diameter (inches)	Tire Width (mm)	Aspect Ratio	Rim Width (inches)
14	185	65	5.5
15	195	60	6.0
16	205	55	6.5
17	215	50	7.0
18	225	45	7.5
19	235	40	8.0
20	245	35	8.5

Wheel Diameter (inches)	Tire Width (mm)	Aspect Ratio	Rim Width (inches)
14	185	65	5.5
15	195	60	6.0
16	205	55	6.5
17	215	50	7.0
18	225	45	7.5
19	235	40	8.0
20	245	35	8.5

Wheel Diameter (inches)	Tire Width (mm)	Aspect Ratio	Rim Width (inches)
14	185	65	5.5
15	195	60	6.0
16	205	55	6.5
17	215	50	7.0
18	225	45	7.5
19	235	40	8.0
20	245	35	8.5

Wheel Diameter (inches)	Tire Width (mm)	Aspect Ratio	Rim Width (inches)
14	185	65	5.5
15	195	60	6.0
16	205	55	6.5
17	215	50	7.0
18	225	45	7.5
19	235	40	8.0
20	245	35	8.5

Magnaflow 4 inch Exhaust Pipe for 2001-2005 Chevy/GMC Duramax Diesel V8 6.6L

Magnaflow 4 inch Exhaust Pipe for 2001-2005 Chevy/GMC Duramax Diesel V8 6.6L

Car Wheel Size Chart

How to Read Tire Size

Product Details

About Magnaflow

Watch in action

MagnaFlow 4-Inch Turbo Downpipe for Duramax Diesel

Key Features:

Vehicle Fitment:

Vehicle Fitment

Often bought with

Product Details

About Magnaflow

Watch in action

MagnaFlow 4-Inch Turbo Downpipe for Duramax Diesel

Key Features:

Vehicle Fitment:

Vehicle Fitment

Often bought with

You May Also Like

DEI Heater Hotter 16oz Coolant Additive — Faster Cabin Warm-Up

Airaid Air Filter Renew Kit - 12oz Cleaner / 8oz Oil

Energy Suspension 3 Pack Formula 5 Prelube — Universal Application

AEM Air Filter Cleaner 32oz Recharge Kit — AEM Induction

DEI Plug Wire Sheath 3/4in x 6in - 4-Pack Aluminized Protection

Access Accessories EZ-Retriever II Cargo Reaching Tool

DV8 Offroad Stainless Steel Replacement Antenna — Fits 1997-2006 Jeep TJ

Ford Racing High Performance Oil Filter — Fits 1979-1995 Ford Mustang

Fabtech Shock Absorber Bellow Boot — Black Universal Protection

Energy Suspension Ultra Low Profile Bump Stop Black — Universal Fitment

Energy Suspension Hyper-Flex Red Rear Shock Bushing Set — Fits 88-98 GM C1500

Energy Suspension 18mm Rear Sway Bar Bushing Set Red — Fits 2005-2007 Scion tC

Energy Suspension Front Strut Rod Bushing Set — Fits 1962-1967 Chevrolet Chevy II Nova

Kooks O2 Sensor Extension Harness — Fits 2019-2020 Ram 1500 (All Trims)

DEI Radiator Relief 16oz Coolant Additive — Universal Cooling System Treatment

DEI Heat Sheath 3/4in x 3ft Aluminized Thermal Sleeving — Universal Engine Protection

All Balls Racing Sprocket Retainer Kit — Fits Yamaha YFZ450 2004-2009

Airaid MXP Cold Air Intake System w/ Tube (Dry / Red Media) — Fits 10-17 Ford Taurus/Flex, Lincoln MKS/MKT

PRP Seats 4.2 Harness - Pink — Seat Belts & Harnesses

Konig Hypergram 18x8.5 5x112 ET43 Matte Black Wheel — Performance Cast

AEM DryFlow Air Filter — Fits 2018-2024 Subaru Crosstrek, 2019-2025 Forester, 2017-2024 Impreza

Wilwood Electronic Parking Brake Caliper Controller - 12V Various AMP - Plastic

Weld S71 20x9 Black Forged Wheel (5x115mm) — Fits Select Chrysler/Dodge

Vibrant 3in OD 120 Degree Tight Radius Aluminum Bend

Toyo Proxes TQ Tire - P345/40R17 108W

Ticon Industries Titanium Welding Sample Pack

AEM Bosch UEGO Replacement Sensor

Skunk2 5-Speed Billet Shift Knob 10mm x 1.5mm 440g — Fits Most Honda & Acura

SeaSucker Talon MAX Bike Rack (Incl. HUSKE Plugs) - Black

Rywire 13B Haltech Mil-Spec Engine Harness — Chassis Specific Adapter — For Mazda 13B Rotary

Russell Performance Speed Bleeder Clutch Assembly - 3AN

Rockford Fosgate Ranger RNGR18-STG4 Stage-4 Audio System (Gen-2) — Fits 2018+ Polaris Ranger

Rhino-Rack Vortex Secure Core Locking End Caps - Set of 4

Renthal 843-01-BK Flat Track MX/Enduro Fatbar Handlebars - Black

Rally Armor Black Mud Flaps w/ Metallic Black Logo for 2021-2024 Ford Bronco (Steel Bumper)

Rally Armor Black Mud Flaps w/ Light Blue Logo — Fits 2025 Hyundai Ioniq 5 N

QuadBoss Winch Hook Pull Strap — Recovery Accessory

Acerbis 02-03 Honda CR125R/250R Plastic Kit - Black

Diode Dynamics 5202-to-H11 Adapter Wires (Pair)

Athena 19-22 Yamaha YZ85 D.53 106cc 53mm Standard Bore Cylinder Gasket Kit

Weigh Safe Keys (Identify Key Code) - Set of 2

Dowco Sportbike WeatherAll Plus Ratchet Motorcycle Cover - Black

BikeMaster Tire Gauge/Hose 60 PSI

Athena 12-14 Ducati 1199 Panigale 1199 Valve Cover Gasket

Athena 12-14 Ducati 1199 Panigale 1199 Spark Plug Hole Gasket

ITP Delta Steel 14x7 / 4x110 BP / 5+2 Offset Black Wheelo

Kenda K775 Washougal II Front Tire - 70/100-19 16551046

Tuff Country 88-98 Chevy Truck K1500/K2500 (6 lug) 4wd 1in Replacement CV Axle Spacer Kit

ARB Bumper Mounting Kit for 3423020

Kuryakyn Brake Pedal Indian Black

You May Also Like

DEI Heater Hotter 16oz Coolant Additive — Faster Cabin Warm-Up

Airaid Air Filter Renew Kit - 12oz Cleaner / 8oz Oil

Energy Suspension 3 Pack Formula 5 Prelube — Universal Application

AEM Air Filter Cleaner 32oz Recharge Kit — AEM Induction

DEI Plug Wire Sheath 3/4in x 6in - 4-Pack Aluminized Protection

Access Accessories EZ-Retriever II Cargo Reaching Tool

DV8 Offroad Stainless Steel Replacement Antenna — Fits 1997-2006 Jeep TJ

Ford Racing High Performance Oil Filter — Fits 1979-1995 Ford Mustang

Wheel Diameter (inches)	Tire Width (mm)	Aspect Ratio	Rim Width (inches)
14	185	65	5.5
15	195	60	6.0
16	205	55	6.5
17	215	50	7.0
18	225	45	7.5
19	235	40	8.0
20	245	35	8.5

Wheel Diameter (inches)	Tire Width (mm)	Aspect Ratio	Rim Width (inches)
14	185	65	5.5
15	195	60	6.0
16	205	55	6.5
17	215	50	7.0
18	225	45	7.5
19	235	40	8.0
20	245	35	8.5