MagnaFlow Down-Pipe 06-07 GM Diesel 6.6L

SKU: MAG15399

Exhaust Pipes, Turbo Downpipes

MAG Downpipe Back Exhaust...

Magnaflow

MagnaFlow Down-Pipe 06-07 GM Diesel 6.6L

SKU: MAG15399

Exhaust Pipes, Turbo Downpipes

MAG Downpipe Back Exhaust...

IN STOCK! Est Ship 3-5 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.

We accept

Description

The MagnaFlow Performance Exhaust Diesel Turbo Downpipe 15399 is a 4in. diameter mandrel bent stainless steel pipe that is weight-optimized with superior flow characteristics and performance. Each performance pipe is produced using precision CNC robotic manufacturing techniques and features 100% durable, corrosion resistant stainless steel construction. Professional installation is highly recommended.

Product Overview

MagnaFlow Y-Pipe and Tru-X Pipe transitions are great for single/dual, dual/dual and balance tube applications. MagnaFlow's stainless steel Tru-X crossover pipe represents a significant leap forward in technology over traditional H-pipes. The more gentle radius allows for better exhaust gas scavenging, noise cancellation and better balance between cylinder banks. The result is a significant increase in power and torque but a reduction in db sound levels... the best of both worlds.

Features and Benefits

Durable Corrosion-Resistant Stainless Steel Construction
CNC Precision Robotic Manufacturing Techniques
Mandrel Bent Tubing

Product Details

Bend Angle:	90 Degree
Bend Type:	90 degrees Bend
Center Line Radius:	N/A
Centerline Radius:	6
Clamp Type:	None
Clamps Included:	No
Color:	Silver
Description:	Direct-Fit Exhaust Pipe
Finish:	Uncoated
Gasket Included:	No
Gasket Or Seal Included:	No
Gauge:	OEM
Grade Type:	Performance
Hangers Included:	No
Inlet Connection Type:	Clamp-On
Inlet Inside Diameter:	4.000 in.
Inlet Type:	Clamp-On
Leg/Straight Length:	N/A
Length:	52.5
Main Piping Diameter:	4.000 in.
Material:	Stainless Steel
Mounting Bracket Included:	No
Outlet Connection Type:	Clamp-On
Outlet Type:	Clamp-On
Overall Length:	52.5
Oxygen Sensor Bung Plug Included:	No
Oxygen Sensor Port:	No
Part Number:	mag15399
Pipe Bend Type:	90 degrees Bend
Pipe Diameter:	4
Pipe Material:	Stainless Steel
Position:	N/A
Prop 65 Y/N:	No
Quantity:	1
Series:	Performance Pipe
Subtitle:	Performance Diesel Pipe
Subtitles:	Downpipe
Tip Diameter:	None
Title:	MagnaFlow Performance Exhaust Diesel Turbo Downpipe 15399
Tube Diameter:	4.000 in.
Tube Wall Thickness:	No
WARNING CA Proposition 65:	No
Welded Hanger:	No

Part Type

Turbocharger Down Pipe

Data: v4.2 - Upd: 2026-10-13 22:25:12

Features

CNC Precision Robotic Manufacturing Techniques
Durable Corrosion-Resistant Stainless Steel Construction
Mandrel bent tubing

Specifications

Product Attributes - Brand: MagnaFlow
Product Attributes - Manufacturer's Part Number: 15399
Product Attributes - Part Type: Exhaust Pipes, Turbo Downpipes
Product Attributes - Product Line: MagnaFlow Turbo Downpipes
Product Attributes - UPC: 841380078094
Product Attributes - Hardware Included: No
Product Attributes - Catalytic Converter Included: No
Product Attributes - Mandrel-Bent: Yes
Product Attributes - Downpipe Material: 409 stainless steel
Product Attributes - Tubing Finish: Natural
Product Attributes - Inlet Diameter (in.): 4.00 in.
Product Attributes - Outlet Diameter (in.): 4.00 in.
Product Attributes - Oxygen Sensor Bung Included: No
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Fits extended and crew cab models only.

Reference Information

Brand Name/s	Magnaflow
StreetFX SKU	mag15399
SFX Item ID	4287600
Supplier Item Code	4287600
Manufacturer SKU	15399
Manufacturer UPC	841380078094
Alternative References	mpe-15399, MFL15399, 6.6L

Brochures

Primary brochure

Compatibility

Application Data

Universal	No
Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	RWD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	RWD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	RWD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	RWD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 3500
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 3500
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	RWD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 3500
Submodel	LS
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 3500
Submodel	LS
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	RWD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 3500
Submodel	LT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 3500
Submodel	LT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	RWD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 3500
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	CHEVROLET
Model	SILVERADO 3500
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	RWD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	GMC
Model	SIERRA 2500 HD
Submodel	BASE
Beginning Year	2002
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	GMC
Model	SIERRA 2500 HD
Submodel	BASE
Beginning Year	2002
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	RWD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	GMC
Model	SIERRA 2500 HD
Submodel	SL
Beginning Year	2001
Ending Year	2002
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	GMC
Model	SIERRA 2500 HD
Submodel	SL
Beginning Year	2001
Ending Year	2002
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	RWD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	GMC
Model	SIERRA 2500 HD
Submodel	SLE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	GMC
Model	SIERRA 2500 HD
Submodel	SLE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	RWD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	GMC
Model	SIERRA 2500 HD
Submodel	SLT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	GMC
Model	SIERRA 2500 HD
Submodel	SLT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	RWD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter

Universal	No
Make	GMC
Model	SIERRA 2500 HD
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	6.6
CID	403
CC	6599
Engine Size	6.6L/403
Engine Family	Duramax diesel V8
Engine VIN Code	1
Drivetrain	4WD
Application Notes	Bed Length Metric: 243.8, Body Type: Extended Cab Pickup. For Vehicles not Originally Equipped with a Catalytic Converter