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ryan riley says: i went from a cheaper unequal length header to these tomei equal length header, and i love them the sound is unique but tep end they really sound clean and like a subaru should. great product would hi ..
5 of 5 Stars!

anthony sasso says: JUST GOT MY BOX IN MAIL AND SPED OVER TO THE MUFFLER SHOP TO HAVE IT INSTALLED ...ITS THE BEST MONEY IVE SPENT IN A WHILE . SEAMLESS INSTALL THE PARTS WENT IN LIKE THEY WERE MADE BY MERCEDES THEM SELF ..
5 of 5 Stars!

Jesus Mendez says: springs were good but not the lowering rate they state.. looks higher on the front end compared to eibach springs. hopefully they do get to settle and lower a bit more but as of now.. dont really like ..
3 of 5 Stars!

Mark Ishak says: Just purchased the B&B exhaust to replace the HKS Carbon Ti. Very deep sound, even with the header, up pipe, and downpipe. Sound levels aren't necessarily low, but strong, and not bad at highway cruis ..
5 of 5 Stars!

Jimmy crutsinger says: I purchased the voltex rear carbon defuser for my 2007 sti limited finall got the product all I can sey is definitely worth the wait! And it looks Amazing! !! ..
5 of 5 Stars!


VF-Engineering Supercharger System 5.0 psi Audi B6 S4 03-05
  • VF-Engineering Supercharger System 5.0 psi Audi B6 S4 03-05
  • VF-Engineering Supercharger System 5.0 psi Audi B6 S4 03-05
  • VF-Engineering Supercharger System 5.0 psi Audi B6 S4 03-05
  • VF-Engineering Supercharger System 5.0 psi Audi B6 S4 03-05
  • VF-Engineering Supercharger System 5.0 psi Audi B6 S4 03-05
  • VF-Engineering Supercharger System 5.0 psi Audi B6 S4 03-05
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  Product Information
 Price: $7,900.00 
  Model: VFK80-11
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VF-Engineering chose to supercharge the Audi S4 to improve throttle response and mid-to-top end power with a roots type Eaton MP90 supercharger. Maintaining the the original Audi quality, smoothness and reliability were the key factors in the VF design. VF have harnessed reliability of Eaton superchargers with their 10 years of supercharging experience and worldwide OEM supply contacts to create the ultimate supercharger system for the ultimate driver;s car.

All key components are 100% made in California. This system has been fully road tested and dyno tuned on the Mustang MD500AWD. The Audi S4 supercharger kit is setup at 5.0 psi and create as much, if not more power than similar products running greater levels of boost.

VF engineers spent over 12 months testing and developing the Audi S4 supercharger kit. Software flash technology and latest Audi file versions have all been employed to provide the cleanest and most reliable method of software installation. All test cars were put through long term full throttle testing in conditions varying from wet cold climates to hot dry Arizona desert temperature for safe-optimal air fuel ratios and knock activity monitoring. Competently-written ECU software has allowed VF to fully explore the potential of the Audi S4 engine, making over 40% more power in most applications.

VF chose to mount the Eaton MP90 supercharger with an in-house CNC machined aluminum bracket system. Our approach to the supercharger development is quite unique when it comes to design and production style. The unit is positioned in line with the original serpentine belt which is replaced with a longer OEM belt. The key to this design is that the OEM active-spring belt tensioner remains fully functional and eliminates belt slip or the need to manually tension the belt. The supercharger air ducts are custom molded in-house from plastic to give an OEM appearance, quality and fit. The incorporated Bosch boost overrun system is designed for smooth off-throttle cruising and deceleration with clean emissions. The crankcase ventilation system is designed to cope with positive pressure and high flow OEM injectors are supplied to fit as direct replacements without modification to the injector rail. The VF supercharger system remains fully OBD2 compliant and is supported by a 1 year unlimited mileage warranty on the product only.

Specs
  • VF custom tuned software
  • Soft rev limiters and top speed governor removed
  • Eaton MP90 polished supercharger
  • 1 year unlimited mileage limited product warranty
  • VF- CNC machined 6061 aluminum bracket system
  • OEM High flow fuel injectors
  • VF- Custom molded polypropylene ducting
  • VF- Custom tuned supercharger intake
  • Bosch overrun bypass valve system
  • Custom crank case ventilation system
  • 4 ply silicon couplers with OEM screw clamps
  • VF- CNC oil fittings with high pressure OEM oil lines
  • Replacement OEM serpentine belt
  • Comprehensive installation CD-ROM
  • Precision Made in California, USA
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    About Manufacturer: VF Engineering
    The VF-Engineering management and engineering team derive their experience of high performance supercharging since 1996 in the UK. Working on modern sports cars such as Audi, BMW, Lotus, Porsche and VW in joint and proprietary projects and partnerships with firms in the UK, Switzerland and USA has given VF the opportunity to market product in European, USA and world markets. VF obtains the latest information and has access to new model vehicles as they roll off the production lines in Germany through OEM connections, clients and manufacturers organizations.


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