SKU: 10212657153

Ferrea Exhaust Titanium Retainer Kit - VW/Audi / 4.2T 40V

Sale price$152.55 Regular price$169.50
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Ships within 48 hours · Estimated delivery Jul 26 - Jul 31

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Description

Ferrea Exhaust Titanium Retainer Kit - VW/Audi / 4.2T 40VActual part may differ from image above. This Kit Includes 16 Ferrea Exhaust Titanium Retainers. Ferrea is pleased to offer our Pro Series Titanium Retainers including sizes that fit both traditional Domestic springs and Sport Compact springs. Precision CNC machined from aerospace quality titanium, these Pro Retainers are fully heat treated and finished to exact tolerances, adding strength while offering a 40% weight reduction over conventional steel

Actual part may differ from image above.


This Kit Includes 16 Ferrea Exhaust Titanium Retainers.


Ferrea is pleased to offer our Pro-Series Titanium Retainers including sizes that fit both traditional Domestic springs and Sport Compact springs. Precision CNC-machined from aerospace quality titanium, these Pro Retainers are fully heat-treated and finished to exact tolerances, adding strength while offering a 40% weight reduction over conventional steel retainers. Examine the overall quality of Ferrea’s Pro-Series Retainers and see why professional engine builders demand Ferrea Racing Components.


- Valve Stem Size: 6 mm

- Diameter (A): 28.20 mm
- Out Step Diameter (B): 22.85 mm
- Inn Step Diameter (C): 17.15 mm


References: Exhaust (8 pieces)Double Spring-7 Degree Pro CNC Ferrea Racing Spring # S10056 & SL1026 Exhaust Spring Seat Locator.


Replaces OEM Part #  058-109-641-B / 058109641 B / 058 109 641 B / 058109641B

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: 10212657153

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4.3 ★★★★★
Based on 25 reviews
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A
Verified Purchase
Amazon Customer
Louisville, US
★★★★★ 5
Work as well as the NGK's
Bought for a 2016 Mazda 6, I had NGK's in it for 5 months and had misfires, didnt have the money to throw more NGK's at it for troubleshooting. Bought these to try and they work great so far.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
C
Verified Purchase
Christopher D. Bodirsky
San Leandro, US
★★★★★ 4
Faulty plug? Otherwise great set
Definitely better than the old plugs that probably had 80k miles on them. The one star off is because I had a misfire after installing. Not sure if I damaged the plug or what, but a reinstall didn't fix the misfire. In my genius, I rushed to try to gap it and ended up breaking the iridium tip. Put the old plug into cylinder 3 (where the misfire was) and it was fine. Gonna have to get a new single tomorrow at my local shop, but a bit frustrating to get a misfire after install.
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Reviewed in the United States on April 27, 2026
B
Verified Purchase
Britincali
Massapequa, US
★★★★★ 5
Upgrade from OEM
After seeing a quite ludicrous $403 quote to change 4 spark plugs in a Mazda3 I decided to show my son how easy it is. These were an upgrade from OEM parts. They were gapped perfectly for the car. They took 20mins to fit and work fine.
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Reviewed in the United States on February 11, 2026
A
Verified Purchase
ANDRES FIGUEROA
San Leandro, US
★★★★★ 5
Very good
The best quality. Runs like new again.
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Reviewed in the United States on March 12, 2026
A
Verified Purchase
Ale
Battle Creek, US
★★★★★ 1
garbage spark plugs
misfired after 30 minutes of driving cylinder 4 misfire code, left me stranded on the highway with baby in car. “(9621)” at the end of description is a lie, was not compatible with my vehicle even with compatibility test.
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Reviewed in the United States on May 17, 2026

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