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2003 GMC SIERRA 1500 HD Exhaust
Showing In Stock Items. Show All 44 Items.
Hedman Street Headers
For the price, no other part can give you the horsepower and fuel economy improvements of Hedman headers. They make Hedman Street headers so well that they guarantee them to be free from defects--including cracks in the tubes and welds--for the life of the headers. Hedman Street headers are available uncoated or in Black Maxx or their polished HTC thermal ceramic coated finishes and, as an added bonus, they also come with all necessary gaskets and mounting hardware. Unless otherwise noted, these headers are designed to fit the vehicle as it came from the manufacturer. This includes components like cylinder heads, chassis, steering, motor mounts, body mounts, and bushings, etc. If your vehicle is using aftermarket components, parts from other applications, or custom-altered parts, then it is the installer's responsibility to verify fitment. Special warning regarding Hedman painted headers only. The paint on these headers is not designed as a final finish; it is designed to protect the headers after the manufacturing process and during shipping. This paint will not withstand the high heat associated with engine break-in, nor will it withstand the heat cycles associated with any type of driving. It is recommended that this protective coating be stripped, and a high heat paint or coating designed for use on headers be applied.
( 2485 )
$414.99
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$734.99
JBA Performance Exhaust Cat4ward Headers
Increase your horsepower and torque with JBA Cat4ward headers! They are designed with 3/8 in. thick laser-cut flanges, mandrel-bent primary tubes, and feature JBA's patented Firecone merge collectors. They're available in either steel or 409 stainless steel and are offered in a chrome plated or high-temperature silver ceramic finish for most applications. JBA includes premium-quality mounting hardware and instructions for the installation and, unless otherwise noted, these headers are designed to fit the vehicle as it came from the manufacturer. This would include components such as cylinder heads, chassis, steering, motor mounts, body mounts, bushings, etc. If aftermarket components, parts from other applications, or custom-altered parts are used on your vehicle, it is the installer's responsibility to verify fitment.
( 493 )
$645.79
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$866.30
Summit Racing™ Header Bolts
Summit Racing™ offers header bolts for a variety of engine applications, from 1955 and up. These stainless steel fasteners have small 3/8 in. hex heads for use with a box end wrench and a 9/16 in. head flange that eliminates the need for washers. For rebuild, restoration, or swap, replacement bolts from Summit Racing™ will properly secure your header.
( 14 )
$13.99
Summit Racing™ Exhaust Flanges
Summit Racing offers exhaust flanges in a variety of 2- and 3-bolt pattern sizes and shapes. The 3/8 in. thick flanges are available in steel or stainless steel—and are designed to ensure an accurate, leak-proof seal for your exhaust components. Order the model that fits your pipe diameter and other fitment specs.
( 96 )
$29.99
Walker Heavy-Duty U-Bolt Clamps
Got an exhaust job? Finish it like a pro with Walker U-bolt clamps. They are manufactured from premium steel for greater strength and durability. They are offered in standard and flat strap styles as well as heavy-duty with or without welded saddles. No matter which style of Walker U-bolt clamps you need, they are all designed for one purpose--to clamp your exhaust together with leak-free performance!
( 100 )
$4.99
BD Diesel Exhaust Manifolds
These BD Diesel exhaust manifolds help you maximize your engines true potential. Your stock manifolds can require extensive cleaning and machining to be recovered from warping and distortion. These heavy-walled manifolds are coated to resist corrosion, with some models even predrilled for pyrometer probes. BD Diesel exhaust manifolds are great preventative upgrades whenever you're doing other engine work.
( 51 )
$573.95
MagnaFlow Universal Catalytic Converters
MagnaFlow universal catalytic converters by Car Sound form the basic building blocks for many applications. The main benefit of universal catalytic converters is that one unit may cover a wide variety of vehicle makes and models. Installing universal converters often requires the use of welding, cutting, and tube-bending equipment that is readily available to most professional installers. They are extremely well made, with features such as: * A ribbed body that minimizes expansion and distortion when the converter heats up. They form a channel that protects the cushioning mat from direct exposure to exhaust gasses, and hold the ceramic catalyst in proper alignment. * A 1/2 in. lap joint where the necks meet the body. The neck does not extend into the converter body, where it could hamper exhaust flow. * Manufactured with separate dies on different sized inlets. Putting larger neck sizes on smaller bodies would reduce the flow of the converter and the quality of the product. * A monolithic honeycomb catalyst. The ceramic is designed for maximum flow and surface area. The coating method is strictly controlled to maintain exact specifications. * Seam-welded close to the converter body for a strong, tight bond. Welding along the edge could allow the converter to expand like the folds in an accordion, allowing the catalyst to move around. * Heavier-gauge stainless steel, tip-to-tip. They do not use inferior mixed weights and materials. * An aluminized or stainless OEM-style ribbed heat shield that creates a rigid wall of protection against heat and adds to the structural stability of the converter.
( 187 )
$119.38
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$523.00
On Sale
Mr. Gasket HEADLOCK Locking Header Bolts
Burning your hands on headers or the exhaust manifold when bolting them on just became a thing of the past. Mr. Gasket HEADLOCK locking header bolts simplify header installation with high-strength, 2-in-1 self-locking bolts that eliminate the need for lock washers. Designed for the performance engine builder, these innovative, patent-pending fasteners have 24 equally spaced serrations in the face of the hex head. The bolts grab and lock on to your manifold surface, virtually eliminating the chance that one might back out from vibration or because of the varying expansion rates of different metals. Mr. Gasket HEADLOCK locking header bolts are available for numerous domestic applications, including Chevrolet, Chrysler, Ford, AMC, Oldsmobile, and Pontiac. They're manufactured from stainless steel, designed to withstand tensile strengths of 150,000 pounds per square inch, and come with a bright polished finish.
( 50 )
$60.25
Dorman Exhaust Manifolds
Dorman exhaust manifolds offer a reliable, direct-fit installation for your vehicle. Manufactured from high-quality materials, they provide the perfect replacements for your worn-out factory piece. Dorman lends a hand in maintaining the exhaust manifold on your daily driver by providing the right fit at the right price--no longer are these "dealer only" parts. Get what you need--think Dorman for your replacement exhaust manifolds.
( 515 )
$130.95
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$188.99
Walker Replacement Exhaust Insulators
Walker insulators are high-quality replacements made to work seamlessly with Walker aftermarket replacement parts. These exhaust insulators are manufactured from premium materials and are available in various applications.
( 74 )
$8.99
AP Exhaust OE Replacement Mufflers
When it's time for a new muffler you can shop for something that might fit, or go with a company that uses 3-D modeling programs for a great fit. AP Exhaust OE replacement mufflers include their Challenge Series and Welded Muffler Assemblies—and are direct-fit, requiring no installation modifications. They feature welded necks for enhanced longevity, minimum back-pressure, and maximum sound control for OE performance. AP's patented single cartridge muffler design is used extensively, and all required brackets are welded to the muffler body for long-lasting strength. AP Exhaust OE replacement mufflers offer a premium direct-fit to quickly get you back on the road. Nearly a thousand models are available; order the size options and configuration recommended for your exhaust setup. Features and benefits include: * Top-quality, heavy-duty construction * Premium-designed to fit and perform like OE welded assemblies * Original equipment appearance and performance * Import and domestic applications * Aluminized components for longer life * Engineered to provide a quiet ride * Easy and quick bolt-on/clamp installation
( 74 )
$161.99
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$224.99
ACDelco Spark Plug Heat Shields
Increase the efficiency of your ignition system with ACDelco spark plug heat shields. They offer maximum protection from conductive and radiant heat, providing strain relief and vibration resistance. The boot protectors are GM-recommended OE replacement parts, compatible with a wide range of makes and models. These steel snap-on accessories prevent lasting damage to your spark plug wires.
( 6 )
$4.99
Dorman Exhaust Manifold Mounting Hardware
Dorman exhaust manifold mounting hardware is designed to replace broken, stripped, or corroded stock fasteners. The studs, bolts, and nuts are manufactured from quality materials and offered in a variety of finishes. Dozens of options are available; choose the lengths and thread sizes needed for your specific vehicle application. Pieces are sold individually, in pairs, or larger quantity sets. A secure exhaust manifold begins with Dorman mounting hardware.
( 288 )
$8.99
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$16.99
Summit Racing™ Spark Plug Boot Heat Shields
Keep your plug wires properly protected from extreme underhood heat with Summit Racing™ spark plug boot heat shields. Our plug wire boot shields are inexpensive, extra protection from damaging heat-generating sources. Protect your plug wire boots and increase their lifetime. They offer an easy, snap-on installation.
( 6 )
$31.99
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$33.99
On Sale
Mr. Gasket Header Bolts
Installing headers can sometimes be a real pain, due to the tight spaces and the location and shape of the tubes. Mr. Gasket can help make installation a little easier and also help prevent annoying exhaust leaks from under-tightened header bolts. They have both the socket-head and hex-head styles of header bolts available. Hex types are heat-treated Grade 5 steel and have smaller-than-standard heads to ease access in tight spaces. Socket-head bolts are made from stronger Grade 8 steel for added ruggedness and they're great for those really difficult-to-reach spots. Both styles have a protective black oxide finish.
( 45 )
$14.71
$9.80
Walker CalCat Universal Catalytic Converters
Specifically created for Californians, Walker CalCat universal fit catalytic converters comply with regulations for OBD-II and pre-ODB-II vehicles. These converters feature a universal, weld-in design at a great cost savings over expensive OEM converters and feature a stainless steel body, heat-shielded pipe, and structural brace for enhanced strength and durability. Get the best balance of performance and price from Walker CalCat universal catalytic converters. Order the model designed for your application needs.
( 41 )
$334.99
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$961.99
Flowmaster 50 Series Big Block Mufflers
Flowmaster 50 series Big Block mufflers have proven to not only significantly improve acceleration and towing power, but to simultaneously increase fuel economy as well. Because of their efficiency, underhood temperatures on trucks and motor homes can be reduced as much as 200 degrees F--helping to lengthen the service life of other engine components. These mufflers are designed and sized for larger gas and diesel engines typically used in towing vehicles and RVs. So, for more comfortable cruising, Flowmaster tuned them for reduced exterior exhaust sound and lower levels of interior resonance.
( 34 )
$306.95
On Sale
Flowtech Headers
Flowtech headers are designed to provide optimum exhaust flow for increased horsepower, torque, fuel economy, and improved throttle response. Leak-tested for maximum performance, they feature the industry's best welds for durability and are carefully engineered for precise fit. Available for a wide range of applications, they're offered in block hugger, competition, fenderwell, lakester, long tube, mid-length, shorty, upright, and turbo styles. Varying with the application, Flowtech headers are constructed from sturdy and lightweight cold-rolled mild steel or stainless steel for increased strength and durability. All tubing is mandrel-bent to provide consistent tubing diameter for smooth flow and increased exhaust velocity. Extra-thick, machined header flanges provide a leak-free seal and maximum strength. For long-term rust and corrosion-resistance, available finishes include natural and polished stainless steel, high heat-resistant black paint, or a satin silver metallic ceramic thermal barrier coating. All mounting hardware and premium gaskets are included. Important notes: Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat. Hooker recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating damage. Flowtech does not recommend the use of header wraps as this will void the warranty.
( 995 )
$511.95
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$665.95
Dynomax Super Turbo Mufflers
Dyno tests prove it—Dynomax's Super Turbo mufflers are the closest you can get to running an open pipe, but a lot quieter. To make things even better, Super Turbos have more features than most other mufflers put together: less backpressure for improved quarter-mile times; durable construction for long life and good looks; patented flow directors that channel exhaust for maximum performance; and fiberglass matting for a deep, throaty, powerful performance tone. The mufflers are available in a variety of configurations; inlet/outlet quantities, sizes and locations; both universal and vehicle-specific applications. They are offered in stainless steel or aluminized steel construction.
( 495 )
$166.99
Fel-Pro Exhaust Manifold Hardware
Fel-Pro exhaust manifold hardware is designed to replace broken, cracked, or stripped fasteners and administer sufficient clamping force to prevent exhaust leaks. The studs are machined from steel to inhibit fatigue, with a black coating to prevent corrosion. Washers are included. Order the hardware set recommended for your vehicle year/make and engine application.
Not Yet Reviewed
$34.99
BRExhaust Exhaust Clamps
BRExhaust offers zinc plated steel U-bolt type clamps to secure your exhaust pipes. The clamps are available for pipe diameters ranging from 2 to 3 in. To ensure a gas-tight connection and secure suspension, BRExhaust recommends replacing mounting parts when fitting a new exhaust. Order the size and quantity needed for your application.
Not Yet Reviewed
$8.99
Dorman Exhaust Manifold Clamps
Exhaust leaks and broken manifold bolts—Dorman has a solution: new exhaust manifold clamps! Their innovative repair clamps attach to the cylinder head, apply pressure to the manifold, and create a seal to take the place of the broken bolts. There's no need to remove the cylinder head, so you save time and money! Easily repair exhaust leaks without removing broken manifold bolts with the help of Dorman clamps.
( 9 )
$39.99
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$41.99
Stainless Works Exhaust Flanges
Stainless Works exhaust flanges are manufactured from premium stainless steel to meet the strictest standards of high-quality, as well as provide superior resistance to corrosion. They help to ensure a more accurate, leakproof seal for your exhaust components when used in conjunction with exhaust flange gaskets. These exhaust flanges are available in several bolt styles, diameters, and thicknesses to suit your project needs.
( 5 )
$51.30
On Sale
Flowmaster American Thunder Exhaust Systems
Flowmaster American Thunder exhaust systems are designed with the latest exhaust technology available--resulting in improved acceleration, passing power, and fuel mileage. A key to these performance upgrades is Flowmaster's use of mandrel-bent tubing, which allows superior exhaust gas flow. The systems also feature mufflers (single or dual) that deliver plenty of the rich Flowmaster sound you expect. Components are built from stainless steel or aluminized steel; and some models include tips. American Thunder exhausts are available in more than a hundred configurations for fitment on specific truck and car applications.
( 550 )
$767.95
