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AUDI A4 Air & Fuel Delivery

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Results 1 - 22 of 22

Go Fast Bits Hybrid Dual Outlet Valves

The Hybrid valve is back! Go Fast Bits Hybrid dual outlet valves are three valves in one; full recirculation, full atmosphere, or 50/50 venting. In 1999, GFB's first Hybrid valve pioneered the dual port design, which was so successful, and the technology has since been adopted by most other brands. By "staging" the two venting outlets at low valve lifts most of the air is recirculated. As the car is driven harder, the valve opens further and more of the atmosphere venting port is exposed for a louder sound--a benefit that makes it possible to use these valves on cars with sensitive airflow meters that often suffer issues such as backfiring and/or stalling, whilst still achieving the signature blow-off sound. Go Fast Bits Hybrid dual outlet valves are direct-fit, bolt-ons with a range that covers a huge list of popular vehicles. Purchase the Hybrid model for your vehicle.

5.0 out of 5 stars ( 2 )

$225.00

Go Fast Bits VTA Performance Blow-Off Valves

Go Fast Bits VTAs are a performance blow-off valve solution for a wide range of foreign and domestic cars and trucks with an electronic factory diverter valve. If you want sound with your performance (or performance with your sound!), these VTAs offer just that! By combining the proven performance benefits of GFB's ground-breaking DV+ with atmosphere venting, the VTA delivers an aggressive blow-off sound, improved throttle response and boost recovery, as well as superior boost holding and reliability in extreme conditions. The VTA shares the successful DV+ design philosophy: "Keep what works, replace what doesn't." This means Go Fast Bits retained ECU control and the solenoid from the factory diverter to ensure the fastest possible response time—without the added and unnecessary cost of replacing the solenoid like some brands do. The weak part of the factory diverter has always been the plastic valve mechanism; this is the part GFB has replaced. The VTA features CNC-machined billet components that last a lifetime, and the valve operation method has been updated for better performance. The factory diverter valve can only operate in two states: open or closed. When it opens fully at low boost or during a partial throttle lift mid-corner, it causes increased lag and a noticeably non-linear boost transition. GFB pioneered the use of "pilot operation" in the DV+, which works by re-purposing the factory solenoid to control the pressure behind the piston rather than the piston itself. This allows the solenoid stroke to be much shorter, speeding up the response time and increasing the actuation force. More importantly, it allows the piston to open and close progressively in response to the amount of boost pressure present, which smooths boost transitions and reduces the lag caused by the factory diverter valve. It's this design philosophy that makes the VTA not only the best performing blow-off valve solution, but also the best value on the market. Order the VTA Performance blow-off valve model recommended for your vehicle. Key features: * TMS Technology for faster boost recovery on gear shift and during throttle modulation * Improved boost holding ability * Atmosphere venting for blow-off sound * Retains ECU control * Simple, direct bolt-on kits include everything you need to install

5.0 out of 5 stars ( 5 )

$198.00

Hitachi Fuel Injectors

Hitachi offers direct-fit fuel injectors for a wide range of vehicles, particularly import models. These stock replacements are built to OEM specifications for performance and longevity. O-ring seals are included. Order the fuel injectors recommended for fitment on your car or truck.

5.0 out of 5 stars ( 2 )

$124.99

Turbosmart Kompact Shortie Plumb Back Blow-Off Valves

Turbosmart Shortie Kompact Series blow-off valves are specifically designed to suit aftermarket and upgraded factory turbos. Unlike standard plastic valves that use single-layer diaphragms (which are known to crack under increased boost), the new Kompact valves use an O-ring sealed piston; coupled with their billet aluminum construction, this allows them to support over 30 psi. These blow-off valves are available as universal models or as a bolt-on replacement for the factory valve on all BorgWarner EFR, KKK, and most Eco-boost turbos. The Kompact Shortie Plumb Back provides better boost response and greater boost handling capability.

Not Yet Reviewed

$254.95

Go Fast Bits SXV Blow-Off Valves

Go Fast Bits SXV blow-off valves are designed to ensure the ultimate reliability, performance, and boost holding. Featuring a 25mm inlet and outlet, the SXV is the perfect valve to replace the plastic OEM bypass/diverter valve or integrate into a turbo system that didn't previously have a valve. Plastic hose-mounted OEM bypass valves are very common, as are the reliability issues they suffer from cracked plastic and diaphragm failures that result in significant boost loss and poor performance. A significantly leaking OEM valve can also accelerate wear or even damage the turbo from over speeding. These SXV blow-off valves utilizes an uncompromising approach to their design and materials to ensure all your hard-earned boost gets to the engine, so the turbo doesn't work harder than it needs to. Deliver your turbos' full potential with the use of these SXV blow-off valves featured from Go Fast Bits! Product Overview: * Precision CNC-machined components for rugged reliability * Viton piston seal for the ultimate boost holding * The operation of the SXV is designed to offer the best possible throttle * An OEM bypass/diverter valve is open until it needs to close—increases turbo lag * An SXV is closed until it needs to open—minimizes turbo lag * By venting only, when necessary, the SXV eliminates the additional lag imposed by the OEM valve, resulting in the best throttle response your turbo system is capable of delivering. * Switch out your OEM valve for an SXV for the ultimate reliability and throttle response, with the peace of mind of Go Fast Bits lifetime warranty!

Not Yet Reviewed

$171.00

CSF Intercoolers

CSF intercoolers are a complete, full line of intercoolers--with coverage ranging from Audi to Volvo. Several different styles are available, including plastic-aluminum and all-aluminum, with standard tube and fin cores as well as heavy-duty bar and plate cores. CSF OE-replacement intercoolers provide a drop-in fit requiring no modifications. All CSF intercoolers are built to OE specifications, and incorporate the same high-quality and value that CSF has been known for and has represented in the industry for decades.

4.22 out of 5 stars ( 18 )

$132.99

$144.99

GMB Electric In-Tank Fuel Pumps

GMB electric in-tank fuel pumps are tested for function and performance. Built to OE specs under strict manufacturing guidelines, they work and look just like the factory sending unit. Malfunctioning fuel pumps deplete the effectiveness of your engine and your vehicle as a whole. GMB pumps are built to feed fuel from the tank and transfer a constant flow of fuel to the engine, while controlling pressure to prevent flooding. Order the replacement model designed for your year, make, and model application.

4.1 out of 5 stars ( 10 )

$143.99

$248.99

Agility Auto Parts Fuel Pump Module Assemblies

Agility Auto Parts offers a complete line of fuel module assemblies covering a wide variety of North American vehicle applications. Engineered and manufactured in a highly automated and dust-free environment, they meet or exceed all OEM specifications for fit, form, and function. Premium quality is ensured through stringent performance and reliability testing for pressure characteristics, flowrates, electrostatic discharge, and leaks. Agility Auto Parts fuel pump module assemblies include all the necessary components for a drop-in replacement right out of the box!

4.14 out of 5 stars ( 14 )

$151.99

$228.99

Carter Replacement OE Electric Fuel Pumps

Carter OE replacement electric fuel pumps are manufactured in a plant that is TS16949 certified and provides the absolute latest in OE-quality certifications. This dedication to excellence, combined with in-depth OE experience, results in products that provide dependable performance that meet or exceed expectations. Carter OE replacement electric fuel pumps feature: * Factory-specified pressure and flow * OE-matched electrical connections * Accurate diameter and length * Original inlet and outlet positions * 100 percent factory-tested reliability * Roller vanes, which are more contaminant-tolerant than other designs * Carbide and brass bearings instead of plastic for longer life and smoother operation

4.39 out of 5 stars ( 181 )

$194.99

$225.99

Standard Motor TechSmart Throttle Bodies

Restore proper engine function with Standard Motor TechSmart throttle bodies. These electronic assemblies will maintain the correct volume of airflow into your engine. Each of these units features a butterfly valve, which is electronically controlled by the ECU to precisely open and close for the correct regulation of the fuel/air mixture. Many feature cast aluminum housings with an exact fit for an easy installation. Standard Motor TechSmart throttle bodies offer durable, reliable performance that have made Standard Motor Products an industry leader for more than 95 years.

4.2 out of 5 stars ( 10 )

$186.99

$236.99

aFe Silver Bullet Throttle Body Spacers

Designed to deliver more horsepower and torque, aFe Silver Bullet throttle body spacers make an excellent addition to your vehicle. They're precision-machined from T-6061 billet aluminum to exacting specifications to provide optimal performance. The combination serrated/helix design creates turbulence so that the air/fuel charge is thoroughly mixed for a complete burn. Their specially-designed serrated edge will reduce the whistling sound normally associated with throttle body spacers. The aFe Silver Bullet throttle body spacers increase the volume between the throttle and cylinder, improving volumetric efficiency.

4.3 out of 5 stars ( 90 )

$137.00

Dorman Turbocharger Oil Lines

In the long list of turbo failure causes, what ranks toward the top? Oil loss! Dorman turbocharger oil lines help to prevent this issue. They are designed as a direct replacement for an OE fit, and a seamless transfer of lubricant to and from the engine's turbocharger. These lines are of the highest in reliability, as they have undergone strict SAE testing to guarantee they meet or exceed the standards for burst, tensile, cold bend and leakage. Whether you are upgrading your factory turbo, or just want to guarantee the reliability of your ride, you can rest easy by using these Dorman turbocharger oil lines.

3.0 out of 5 stars ( 2 )

$223.99

Hitachi Electric In-Tank Fuel Pumps

Hitachi offers electric in-tank fuel pumps for a wide range of vehicles, particularly import models. These stock replacements are built to OEM specifications for performance and longevity. Most pumps also include a sending unit. Order the electric in-tank fuel pump recommended for fitment on your car or truck.

5.0 out of 5 stars ( 1 )

$153.99

Summit Bucks

Delphi Fuel Injection Pressure Regulators

Fuel injection pressure regulators directly affect your engine and vehicle performance and can be a major contributor or hindrance to fuel economy. Delphi fuel injection pressure regulators provide consistent and predictable fuel pressure for superior drivability. These regulators maintain the correct pressure from your tank to the injector for varied driving conditions, providing enhanced fuel control accuracy. Delphi fuel injection pressure regulators feature precisely manufactured internal valves, diaphragms, and springs for excellent performance, longer life, and improved durability.

4.51 out of 5 stars ( 35 )

$156.99

Cardone Remanufactured Throttle Bodies

Cardone remanufactured throttle bodies use 100 percent computerized testing of motor, throttle position sensor, and articulation to ensure reliable and consistent performance. Each unit is disassembled and every component is inspected, remanufactured or replaced to ensure a durable, high-quality product. Specialized component cleaning processes prevent the throttle bore surface from being deformed—facilitating optimum airflow. For impeccable fit, function, and savings, order the Cardone remanufactured throttle body designed for your vehicle application.

4.13 out of 5 stars ( 16 )

$100.99

$203.99

Body Parts Intercoolers

Body Parts intercoolers are high-quality, direct-fit replacements for a variety of applications. The intercoolers are built to provide the performance, durability, and service life you expect from an OEM replacement. Order the model recommended for your vehicle and engine type.

Not Yet Reviewed

$110.99

Hella Fuel Pump Module Assemblies

Hella fuel pump module assemblies are built to high-quality standards, designed to be easily mounted, and are available in different styles to fit a large scale of applications. They will deliver higher efficiency and the precise fuel supply required for a partial or full load--saving fuel and reducing CO2 emissions. Choose the Hella fuel pump and sender assembly designed for your vehicle.

Not Yet Reviewed

$110.99

$241.99

Summit Bucks

Delphi Fuel Pump Module Assemblies

Delphi fuel pump module assemblies are nickel plated with all-steel internal components. They feature internal guide rod springs and external rubber feet for enhanced stability and reduced noise from vibration. These fuel pumps have little flow or pressure variation in hot fuel situations. Delphi fuel pump modules are designed to be OE replacements.

4.51 out of 5 stars ( 250 )

$263.99

Summit Bucks

Delphi Electric Fuel Pumps

Delphi electric fuel pumps are manufactured from high-quality materials. They operate under extreme temperatures and provide your vehicle with quicker engine starts. These fuel pumps are designed to be OE replacements, though universal models are also available. Find the free flow rate, maximum pressure, inlet size, and other options needed for your application. When fuel pressure becomes a problem for your vehicle, order a new Delphi electric fuel pump to restore performance!

4.02 out of 5 stars ( 48 )

$157.99

Standard Motor Vapor Canister Components

Rough idle, hard starting, and the check engine light--these are a few symptoms that can alert the driver that a potential EVAP problem has occurred. Standard Motor vapor canister components featurie industrial-grade materials for robust performance, they are manufactured for prolonged life and superior performance. As a global manufacturer of emission components, Standard Motor maintains complete quality control through the manufacturing process from start to finish.

4.47 out of 5 stars ( 15 )

$103.99

$114.99

Standard Motor Fuel Injectors

Standard Motor Products fuel injectors help you attain maximum fuel efficiency and power from your engine. Properly operating injectors are essential components for enabling your vehicle to run flawlessly. These OEM stock replacements are available for hundreds of specific applications. Don't drive with faulty fuel delivery. Update worn or malfunctioning fuel injectors with reliable models from Standard Motor Products.

4.68 out of 5 stars ( 246 )

$125.99

$189.99

Cardone New Throttle Bodies

Cardone new throttle bodies are guaranteed to fit and function like the original, due to Cardone's proprietary engineering standards. Each replacement unit is built and tested as a complete assembly to ensure quick installation and reliable performance. All components match the original equipment, ensuring accurate airflow in all driving conditions and peak engine performance. Order the model recommended for your vehicle.

4.33 out of 5 stars ( 6 )

$140.99

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