2003 GMC Sierra 2500 Performance and Racing Products

K&N air intake systems are engineered for increased performance, outstanding durability, and sleek aesthetics – and are available in an assortment of finishes and powder coatings. K&N’s state-of-the-art High-Flow Air Filter helps to shield your engine from contaminants, while a meticulously engineered aerodynamic tube design contributes to a guaranteed increase in horsepower and torque. K&N air intake systems are designed to improve acceleration, towing, and throttle response while providing world class protection for your engine. Our intakes are dyno-tested and provide up to 50% more airflow compared to OEM intake systems. K&N intakes are easy to install and maintain with air filter cleaning required only every 100,000 miles.

Product Features:

• GUARANTEED INCREASE IN HORSEPOWER: Dyno-tested with up to 50% more airflow than restrictive factory box air filter and intake tube
• BETTER TOWING: Improves acceleration and uphill performance when towing by improving throttle response.
• IMPROVED ENGINE SOUND: Hear the power under the hood.
• WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants
• EASY MAINTENANCE: No filter cleaning required for up to 100,000 miles
• EASY TO INSTALL: Bolt-on power in less than an hour with basic hand tools. K&N air intake systems are one of the easiest ways to guarantee an increase in horsepower.
• DYNO TESTED: Dyno-tested for a guaranteed increase in horsepower and acceleration with no ECU tune required
• HIGH QUALITY: Made in America.

A true performance application component for cars, trucks, hot rods, racing/competition, yet popularly used for street vehicles when more horsepower is added. Soft running enough to absorb vibrations for street use yet rugged for racing use. Helps control torque on high performance vehicles. Maintains proper drive shaft angle to help prevent early wear and unexpected power train damage. Replaces the original, short lived and typically too-soft rubber mounts and outdates those hard-running metal transmission mounts. Resistant to under vehicle fluid oils, coolants and road contaminants. Made of Energy’s Hyper-Flex performance polyurethane and heavy duty hardware – for added durability.

Product Features:

• Unique Safety Interlock Design
• Impervious to Vehicle Oils and Chemicals
• Strong Enough Too Handle High Performance

Product Features:

• GM10.5″ 14 BOLT OPEN EMPTY CASE 4:10 & DWN

The X4 Performance Programmer connects high-performance tunes to your vehicle for an immediate boost in horsepower and torque. Awaken your engine to its maximum real potential with preloaded, dyno-proven tune files through the easy-to-use functionality. Instantly increase horsepower and torque and customizeModify a variety of parameters at the touch of a button, all while monitoring gauges on a customizable display.

Product Features:

• Read vehicle performance data on a full-color LCD display for easy viewing, day or night.
• Preloaded, street-tested, dyno-proven tunes boost horsepower, torque, and throttle sensitivity.
• Reads and clears DTC (Diagnostic Trouble Codes) with ease.
• Load up to 10 custom tune files created by any SCT Custom Tuning Dealer.
• Full color LCD display
• High-speed data logging/monitoring
• Dual analog inputs
• Most popular vehicles supported
• Installs quickly and easily
• Easy restoration back to stock
• User adjustable vehicle parameters
• USB Interface cable included
• Product might not be available in all states due to local laws.

The BDX hand-held performance tuner gives drivers the edgepower they need, whether tackling tough terrain, pulling a heavy payload, or maximizing fuel economy on the highway. Its sleek design, full-color display, and customizable gauges help track and adjust powertrain performance to deliver more horsepower and torque when it’s needed most. Cloud-based tune delivery over built-in WiFi means that the BDX will always be running the latest tuning – enabling drivers to stay one step ahead of the packÿ.

Product Features:

• Monitor and display vehicle data using the on-screen virtual gauges.
• Preloaded, street-tested, dyno-proven tunes boost horsepower, torque, and throttle sensitivity.
• Reads and clears DTC (Diagnostic Trouble Codes) with ease
• Product might not be available in all states due to local laws.

Spectre air intake systems are designed to get more horsepower and torque from your vehicle while working to protect your engine from harmful debris. This air intake system comes with a washable, reusable low restriction Spectre air filter, polished aluminum intake tubing and a black powder coated 2-piece heat shield to help prevent heated engine air from entering the intake inlet. Spectre air intakes come with velocity stack, coupler, stainless steel clamps, edge trim, and all necessary hardware for an OE fit and finish. The air filter mounts on the driver side.

Product Features:

• DESIGNED TO INCREASE HORSEPOWER AND TORQUE: Dyno-tested with up to 50% more airflow than restrictive factory box air filter and intake tube
• BETTER TOWING: Improves acceleration and uphill performance when towing by improving throttle response
• IMPROVED ENGINE SOUND: Hear the power under the hood
• WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants and debris
• EASY MAINTENANCE: No filter cleaning required for up to 100,000 miles
• EASY TO INSTALL: Bolt-on power in less than an hour with basic hand tools- Spectre air intake systems are one of the easiest ways to increase horsepower
• HIGH PERFORMANCE AIR FILTER: Advanced oiled synthetic filter design helps protect your engine against damaging contaminants
• WILL NOT VOID VEHICLE WARRANTY

K&N air intake systems are engineered for increased performance, outstanding durability, and sleek aesthetics – and are available in an assortment of finishes and powder coatings. K&N’s state-of-the-art High-Flow Air Filter helps to shield your engine from contaminants, while a meticulously engineered aerodynamic tube design contributes to a guaranteed increase in horsepower and torque. K&N air intake systems are designed to improve acceleration, towing, and throttle response while providing world class protection for your engine. Our intakes are dyno-tested and provide up to 50% more airflow compared to OEM intake systems. K&N intakes are easy to install and maintain with air filter cleaning required only every 100,000 miles.

Product Features:

• GUARANTEED INCREASE IN HORSEPOWER: Dyno-tested with up to 50% more airflow than restrictive factory box air filter and intake tube
• BETTER TOWING: Improves acceleration and uphill performance when towing by improving throttle response.
• IMPROVED ENGINE SOUND: Hear the power under the hood.
• WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants
• EASY MAINTENANCE: No filter cleaning required for up to 100,000 miles
• EASY TO INSTALL: Bolt-on power in less than an hour with basic hand tools. K&N air intake systems are one of the easiest ways to guarantee an increase in horsepower.
• DYNO TESTED: Dyno-tested for a guaranteed increase in horsepower and acceleration with no ECU tune required
• HIGH QUALITY: Made in America.

Spectre air intake systems are designed to get more horsepower and torque from your vehicle while working to protect your engine from harmful debris. This air intake system comes with a washable, reusable low restriction Spectre air filter, polished aluminum intake tubing and a black powder coated 2-piece heat shield to help prevent heated engine air from entering the intake inlet. Spectre air intakes come with velocity stack, coupler, stainless steel clamps, edge trim, and all necessary hardware for an OE fit and finish. The air filter mounts on the driver side.

Product Features:

• DESIGNED TO INCREASE HORSEPOWER AND TORQUE: Dyno-tested with up to 50% more airflow than restrictive factory box air filter and intake tube
• BETTER TOWING: Improves acceleration and uphill performance when towing by improving throttle response
• IMPROVED ENGINE SOUND: Hear the power under the hood
• WORLD CLASS PROTECTION: Pushing the limits of engine protection by protecting your engine from harmful contaminants and debris
• EASY MAINTENANCE: No filter cleaning required for up to 100,000 miles
• EASY TO INSTALL: Bolt-on power in less than an hour with basic hand tools- Spectre air intake systems are one of the easiest ways to increase horsepower
• HIGH PERFORMANCE AIR FILTER: Advanced oiled synthetic filter design helps protect your engine against damaging contaminants
• WILL NOT VOID VEHICLE WARRANTY

Flowmaster’s Scavenger Series Elite shorty headers are designed to replace the restrictive factory manifolds. These high quality headers are manufactured from stainless steel and are ceramic coated for maximum durability. They feature 1-5/8 in. primary tubes, 3/8 in. thick laser cut flanges and factory collector connections, ensuring a direct-fit, leak free installation. Like all Flowmaster products, the benefits include improved throttle response, power and engine efficiency. Designed for an easy fit, these headers include gaskets and necessary hardware for easy installation. Note: this product has been granted a California Air Resources Board (CARB) exemption, an E.O. number, or is a direct or consolidated replacement part. It is 50-state legal, per the application guide.

Product Features:

• Stainless steel construction
• 50 state emissions certified
• Dyno tuned for maximum performance
• High temperature ceramic coated
• 0.375 thick laser cut flanges

Shorty Smog Headers

The MSD 8.5mm super conductor wire is the performance wire. Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire; incredibly low resistance without electronic interference. In a single 12 inch length of super conductor wire there is only 40 – 50 ohms of resistance. That is the lowest resistance of any helically wound wire. To accomplish this, we use a copper alloy conductor due to it’s great voltage carrying capabilities. The low resistance results in less loss in spark energy so more reaches the spark plug. The conductor is wound extremely tight around a special center core. So tight in fact, that there is over 40 feet of conductor wrapped into a single foot of plug wire. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective electro magnetic interference (EMI) or choke. This choke, or suppression capability, keeps the EMI inside the wire where it cannot interfere with other electronics on your vehicle. The outer sleeve that surrounds the conductor assembly is just as impressive. A proprietary blend of silicone and synthetic material produce a sleeve that is highly resistant to high heat as well as abrasion and tears. Available in universal kits and bulk lengths.

Product Features:

• Bolt-on Performance
• Custom Fit For Make And Model Listed
• Wires Are Pre-Cut To Exact Specifications
• Conductor core features DuPont Kevlar material for increased tensile strength
• Durable outer sleeve is a proprietary compound for resistance to high heat or abrasion
• Stainless steel terminals feature dual crimp tabs to grip wire conductor and outer jacket separately

The Stealth Pro Ratchet shifter is one of our most popular and easiest to operate race shifters. Features include positive ratcheting design that self-centers the handle after each shift giving you maximum clearance behind the shifter and will not allow y

Product Features:

• Reverse Lockout Meets NHRA And IHRA Requirements
• Carbon Fiber Look Without The Cost
• Reliable And Race Proven Shifter Design
• Short Throw
• Stick Returns to Center

The Original Pro Stick shifter delivers rock-solid performance, mixed with clean design cues and compact size. This is why you see so many Pro Stick shifters at the race track. We start off with a heavy duty steel base with a hardened steel gate plate, a reverse lockout feature that only requires one hand to operate, and complies with NHRA/IHRA safety rules. Then add the billet aluminum shift handle with classic white shift knob, lightweight aluminum trigger and finish it off with a brushed aluminum cover with quick release pins, and you end up with one good looking bullet-proof race shifter. Optional Forward and Reverse shift pattern gate plates are available for most popular 2, 3 and 4-speed transmissions. This model Pro Stick comes out of the box ready for action for most popular 3-speed transmissions, includes a 5-foot Super Duty shift cable, brackets, levers, hardware and detailed instructions for an easy installation. Be sure to check out all the optional Magnum Grip side grip plates including the one and two button 12-volt momentary switches or any of the other accessories we offer for the Pro Stick in the Shifter Accessories section. Notes: AOD requires installation kit #40496, AODE & 4R70W requires installation kit #40504, E40D & 4R100 requires installation kit #40505, 2004R & 700R4 require gate plate #80712, 4L60E – 4L85E equipped with PRNDL switch requires cable bracket kit #70499 and gate plate #80712. Overall Dimensions – 8.25L x 2.92W x 9.25H

Product Features:

• All One-Handed
• Reverse Lockout Meets NHRA And IHRA Requirements
• Mount Directly To Floor/Chassis/Or w/Quick Release
• Ultimate For Powerglide Applications
• Lightweight Brushed Alum. Cover
• Cover Removed Quickly and Easily
• Includes 5 Ft. Super Duty Race Cable
• Quick Change Plate Design

The B&M Unimatic is an ideal replacement for column shift vehicles, includes neutral safety switch, 5 foot cable and a boot and plate.

Product Features:

• Ideal As Column Shift Replacement
• Includes Neutral Safety Switch
• Includes Black T-Handle
• Backup Light Not Available
• Includes 5 ft. Cable and Hardware
• Includes Boot and Plate

The B&M Quicksilver features a ratcheting action for positive shifts, Chrome Knob, neutral safety switch, NHRA/IHRA approved Reverse Lockout. Fits Most 3 and 4 speeds.

Product Features:

• Universal Floor Mount Application
• Base Trimmed For Custom Fit
• Cable Operated
• Quick Installation
• Accurate Shifting

The B&M Sport Shifter features, Neutral safety switch, backup light switch, lighted gear indicator and black T-Handle and cable. Fits Most 3 and 4 Speed applications.

Product Features:

• Base Trims For Custom Fit
• Neutral Safety Switch
• Backup Light Switch
• Lighted Gear Indicator
• Black T-Handle and Cable

The B&M Megashifter has it all, form, function and classic style. This all adds up to bring you a quality shifter that’s been one of the most popular automatic shifters of all time. The light truck Megashifter is better suited for truck and bench seat applications with its overall height of 14.85-inches tall (2.25-inches taller than #80690 Megashifter.) The positive ratcheting action won’t allow you to over-shift and miss a gear at that critical moment, along with the reverse lockout feature meets NHRA/IHRA safety rules for those weekend grudge races at the track, while the look and feel of the T-handle and accordion style shift boot really shows off its racing heritage. Other features include a black console that you can trim to match the contour of your vehicle’s floor, 5-foot long shifter cable, cable brackets, transmission shift levers, chrome plated top plate with lighted gear indicator and everything needed for an easy at home installation. An optional T-handle with a 12-volt button is available separately for actuating a trans-brake, nitrous oxide or other accessories for the hard-core performance enthusiast. This shifter fits most popular Chrysler, Ford and GM 3 and 4-speed automatic transmissions. Note: AOD transmissions require optional kit #40496, GM 4L60E through 4L85E transmissions with PRNDL switch will require optional kit #70499. Overall Dimensions – 14.9L x 6.4W x 14.8H

Product Features:

• Universal Floor Mount Application
• Cable Operated
• Quick Installation
• Accurate Shifting
• NHRA/IHRA Reverse Lockout Meets Requirements
• Use w/Reverse Pattern Valve Body
• Includes Neutral Safety Switch
• Includes Backup Light Switch

The B&M Megashifter has it all, form, function and classic style. This all adds up to bring you a quality shifter that’s been one of the most popular automatic shifters of all time. First off let’s talk function. The Megashifters positive ratcheting funct

Product Features:

• Universal Floor Mount
• Base Can Be Trimmed-Custom Fit
• Cable Operated
• Quick Installation
• Accurate Shifting