aFe Downpipe - 49-04093

Optimize your 01-04 LB7 GM diesel's airflow to improve throttle response with aFe's ATLAS 3" turbo down-pipe.Constructed from 3" mandrel bent steel tubing for maximum flow, the larger tube diameter and smooth transition bends allow increased airflow between your OE turbo and exhaust to reduce EGT's for quicker turbo spool times. The CNC machined heavy duty inlet flange with turbine gasket and V-band outlet flange ensure an OE-style, 360 degree sealing surface. Coated with a black finish, the ATLAS turbo down-pipe is wrapped with thermal header tape to reduce EGT's for improved performance and durability. Flow and Performance: The ATLAS turbo down-pipe is made from 3" mandrel bent steel tubing offering smoother transition bends for low turbulence to deliver quicker throttle response. Perfect Fit: The ATLAS turbo down-pipe is an upgrade to the OE down-pipe and utilizes the factory mounting locations for true bolt-on performance. Finish: This down pipe is coated with a black finish and wrapped in thermal header tape for better insulation. This reduces EGT's and under hood temperatures. Note: This system is not currently CARB exempt or available for sale in California, and cannot be used on any vehicle registered with the California Department of Motor Vehicle. This item in not legal in NY for use on vehicles with CA emissions.

This Part Fits:

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

Please note image may vary from product. Also, some items are special order. If delivery time is a concern, please contact us prior to purchase. ​

AFE (Advanced Flow Engineering) is a leading name in the world of high-performance automotive parts, trusted by enthusiasts who demand nothing but the best for their vehicles. Specializing in cutting-edge cold air intake systems, high-flow exhaust systems, premium performance filters, and more, AFE is all about unlocking your vehicle's true potential.

Designed for drivers who crave power, efficiency, and performance, AFE products are engineered to maximize airflow, boosting horsepower, torque, and fuel economy. Whether you're upgrading your truck, SUV, or performance car, AFE offers precision-engineered solutions that deliver impressive gains under the hood.

Crafted from top-tier materials like high-quality aluminum, stainless steel, and advanced filtration media, AFE parts are built for durability, performance, and style. With a commitment to innovation and excellence, AFE continues to push the boundaries of automotive performance, offering complete performance packages that transform your vehicle into a powerhouse on the road.

When you choose AFE, you're choosing a brand that’s as passionate about performance as you are. Unleash your vehicle’s full potential and experience the AFE difference today!

​The aFe POWER Product Development center is where great ideas take shape. Our product development engineers utilize the most sophisticated tools available for data capture and reverse engineering of complex vehicle geometry such as floor surfaces, cargo areas, window openings or fenders. In the end, R&D, Engineering, Product Design, Tool Manufacture and Marketing all come together to create the finest automotive accessories available, from Concept to Consumer!

Nestled in Corona, California sits our company headquarters where all the manufacturing magic happens. Our modern headquarters is home to a variety of resources – from order fulfillment, to marketing, to shipping operations – in one location, right here in America! Just a few paces from the conveyor belts, you’ll find our very own publicly-accessible factory store, which features the best products in vehicle protection on display and available for purchase!​

​When you choose AFE, you're choosing a brand that’s as passionate about performance as you are. Unleash your vehicle’s full potential and experience the AFE difference today!

Fidanza Performance, founded in 1997, is a leading US manufacturer of high-quality lightweight aluminum flywheels, precision adjustable cam gears, and high-performance clutches. With nearly 20 years in the automotive performance market, Fidanza is renowned for its expertise and respected globally, offering products for a wide range of vehicles, from European sports cars to modern muscle cars and imports. The company originated in racing, with founder Lou Fidanza's success in the SCCA leading to the creation of specialty parts like aluminum flywheels. Fidanza has since expanded its product line to include cam gears and performance clutches, gaining a loyal customer base and worldwide recognition. In 2023 Fidanza opened the SpeedParts4Less Marketplace which sells other manufacturers quality high performance parts!