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MagnaFlow CARB Direct-Fit Catalytic Converter 4551642 for the 2003-2007 Chevrolet Silverado 2500 HD / 3500

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MagnaFlow 4551642 shown out of the box, photo 9

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MagnaFlow 4551642 carb direct-fit catalytic converter, opposite front three-quarter view of the turntable spin

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MagnaFlow 4551642 carb direct-fit catalytic converter, opposite side view of the turntable spin

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MagnaFlow 4551642 carb direct-fit catalytic converter, rear three-quarter view of the turntable spin

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MagnaFlow 4551642 carb direct-fit catalytic converter, side view of the turntable spin

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MagnaFlow 4551642 shown out of the box, photo 31

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MagnaFlow 4551642 carb direct-fit catalytic converter, rear view of the turntable spin

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MagnaFlow 4551642 carb direct-fit catalytic converter, opposite rear three-quarter view of the turntable spin

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MagnaFlow 4551642 carb direct-fit catalytic converter, front three-quarter view of the turntable spin

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MagnaFlow CARB Converter 2003-2007 Chevrolet Silverado 2500 HD / 3500

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Brand: MagnaflowSKU / Part #: MAG4551642

Regular price: $1,674.00
Regular price: ~~$1,674.00~~
Sale price: $1,674.00
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Subtotal: $1,674.00

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MagnaFlow CARB Converter 2003-2007 Chevrolet Silverado 2500 HD / 3500

Subtotal: $1,674.00

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Overview

In CARB states, a replacement converter for the 2003-2007 Chevrolet Silverado 2500 HD / 3500 6.0L/8.1L must be listed on a valid Executive Order. MagnaFlow 4551642 is covered by EO D-193-184 and installs at the factory mounting points. It is catalogued for the 2003, 2006 Chevrolet Silverado 2500 HD (Base, LS, LT, WT), 2003, 2006 Chevrolet Silverado 3500 (LT, WT, Base, LS), 2007 Chevrolet Silverado 3500 Classic (LS, LT, WT) and 2007 Chevrolet Silverado 2500 HD Classic (LS, LT, WT), plus 4 more models in the table below. Shipping weight is about 30 lb.

Features

CARB EO D-193-184 for 6.0L/8.1L engine families listed on the order
Fits 2003, 2006 Chevrolet Silverado 2500 HD: Base, LS, LT, WT
Fits 2003, 2006 Chevrolet Silverado 3500: LT, WT, Base, LS
Fits 2007 Chevrolet Silverado 3500 Classic: LS, LT, WT
5 further models listed in the fitment table

What is in the box

Gaskets and mounting hardware for installation

Specs

Part number	4551642
Type	CARB Direct-Fit Catalytic Converter
Emissions	California Grade, CARB EO D-193-184
Material	16-gauge 409 stainless steel
Shipping weight	30 lb

Construction

California Grade converter covered by CARB Executive Order D-193-184
Direct-fit layout: no cutting, welding or pipe stretching
Body and pipes in 16-gauge 409 stainless steel
Spun body closed with a single laser-fusion weld to resist leaks
Mandrel-bent inlet and outlet pipes keep factory flow
OE-sized 410 stainless hangers
308 stainless MIG welds
Shape developed from 3D scans of the original part

Installation

Direct-fit and bolt-on; a capable DIYer can install it with the right tools, though professional installation is recommended.

Fitment notes

Legal in all 50 states when the vehicle's engine family appears on this converter's Executive Order. Confirm your engine family before ordering. Check the fitment table below against your vehicle, including trim and engine.

Fitment

Make	Model	Chassis	Year	Engine
Chevrolet	Silverado 2500 HD (Base, LS, LT, WT)	—	2003, 2006	6.0L/8.1L
Chevrolet	Silverado 3500 (LT, WT, Base, LS)	—	2003, 2006	6.0L/8.1L
Chevrolet	Silverado 3500 Classic (LS, LT, WT)	—	2007	6.0L/8.1L
Chevrolet	Silverado 2500 HD Classic (LS, LT, WT)	—	2007	6.0L/8.1L
GMC	Sierra 3500 (Base, SL, SLE, SLT, WT)	—	2003, 2006	6.0L/8.1L
GMC	Sierra 3500 Classic (SL, SLE, WT)	—	2007	6.0L/8.1L
GMC	Sierra 2500 HD (Base, SL, SLE, SLT, WT)	—	2003, 2006	6.0L/8.1L
GMC	Sierra 2500 HD Classic (SL, SLE, SLT)	—	2007	6.0L/8.1L

Fitment

Year	Make	Model
2003–2003	Chevrolet	Silverado 2500 HD
2006–2006	Chevrolet	Silverado 2500 HD
2003–2003	Chevrolet	Silverado 3500
2006–2006	Chevrolet	Silverado 3500
2007–2007	Chevrolet	Silverado 3500 Classic
2007–2007	Chevrolet	Silverado 2500 HD Classic
2003–2003	GMC	Sierra 3500
2006–2006	GMC	Sierra 3500
2007–2007	GMC	Sierra 3500 Classic
2003–2003	GMC	Sierra 2500 HD
2006–2006	GMC	Sierra 2500 HD
2007–2007	GMC	Sierra 2500 HD Classic

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

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