SKU: 59436686766

Deatschwerks Set of 8 550cc Injectors for Audi S4/RS6/S6/S8 4.2L V8 2001-09 (21S-06-0550-8)

Sale price$323.55 Regular price$359.50
Save 10%

Pay in installments of $89.88 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 11 - Aug 16

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Deatschwerks Set of 8 550cc Injectors for Audi S4/RS6/S6/S8 4.2L V8 2001-09 (21S-06-0550-8)Deatschwerks Set of 8 550cc Injectors for Audi S4 RS6 S6 S8 4. 2L V8 2001 09 (21S 06 0550 8). DeatschWerks pioneered the application specific fitment approach to high performance fuel injectors in 2005 when universal was the standard. This passion for innovation has continued over the years and has culminated in the current line up which represents the most comprehensive and best supported injector line in the industry. The right tool, used

Deatschwerks Set of 8 550cc Injectors for Audi S4/RS6/S6/S8 4.2L V8 2001-09 (21S-06-0550-8). DeatschWerks pioneered the application specific fitment approach to high-performance fuel injectors in 2005 when “universal” was the standard. This passion for innovation has continued over the years and has culminated in the current line up which represents the most comprehensive and best-supported injector line in the industry. The right tool, used incorrectly, yields substandard results at best. Fuel injectors follow this same universal law. Proper data is required for proper tuning. All DW injectors are fully characterized in-house via SAE J1832 standards. Injector data is available in General Characterization Summaries and Application Specific formats. Using the data is easy. Often it is cut and paste from the DW excel sheet to the tuning software.

Development of accurate injector data is a complex process, but there are no shortcuts to a proper calibration. DW has developed specially designed and calibrated flow benches utilizing digital flow meters, which are required to measure the precise fuel mass needed for proper characterizations. The data acquisition process consists of collecting over 450 data points per injector part number. These data points cover pulse widths, pressures, and voltages that the injectors will experience once installed in your engine. The collected data is statically analyzed, scrubbed and formatted into a General Characterization Summary. This Summary can then be formatted into application-specific formats for different makes, models, and tuning platforms. The application specific data is then in-car optimized by one of our tuning partners. Quality injectors mated to proper calibration data will still perform poorly as a system if the injector set is not properly flow matched. The DW dynamic flow matching process ensures each set works together as a system to fuel your engine properly. Fuel injectors do not operate in a static state so why test them in a static state? In the engine, fuel injectors are a very dynamic component, constantly changing frequencies and pulse widths to precisely deliver the fuel needed.

Features:

  • Improves fuel flow and performance
  • Multi-point dynamic set matching
  • Drop-in fitment
  • E85 compatible
  • Flow rates and set balancing in-house by DeatschWerks
  • Flow balanced to within 1-2% (flow report included)
  • Excellent spray pattern and atomization for optimized idle and tuning
  • Packaged ready to install
  • Backed by a 3-year comprehensive warranty
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 59436686766

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.3 ★★★★★
Based on 11 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
S
Verified Purchase
Sonia
Lake Worth, US
★★★★★ 5
Comfort and style
Size: 8.5, Color: Chestnut
Like walking on clouds with support. Thank you Ugg’s. Perfect size 8.5 Will buy again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 11, 2026
J
Verified Purchase
Jennifer
Lake Worth, US
★★★★★ 5
Style, Comfort
Size: 9, Color: Sand
If I could give a Ten Star review, I would. Hands down the most comfortable pair of sandals I have ever owned. I wore them 16 days straight while touring Italy. Comfortable and goes with all of your outfits. They pack well in a suitcase too. Light weight.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
N
Verified Purchase
Naomi L.
Chelsea, US
★★★★★ 5
Wonderful
Super comfy and easy on and off, yet stylish imo! I could walk miles in these as a 56 yo and have worn them for three years! I hope they never stop making them. The only tweek I would suggest is to cover the footbed with leather or suede not cloth so they would last longer!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
J
Verified Purchase
Johsz Family
Charlottesville, US
★★★★★ 5
Great value and super comfy!
Size: 7, Color: Sand
These shoes are so comfortable and my new go to for summer. They are lightweight and fit like a glove. Great value
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
K
Verified Purchase
Kindle Customer
Chelsea, US
★★★★★ 5
Lovely sandals!
I highly recommend! These are so comfortable! Right out of the box, they can be worn all day. The velcro-adjustable straps are great for making for a perfect fit. The aren't clunky to wear, even though they appear to be. They're super cute, in my opinion. The sock liner is textile, so feet feel good all day, not slimy, like leather and suede can sometimes make feet feel if socks aren't worn.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2026

recommand products