SKU: 20117408216

4Piston Racing Advanced Performance RACE Valve Spring Kit - K-Series

Sale price$358.88 Regular price$398.75
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Ships within 48 hours · Estimated delivery Sep 4 - Sep 9

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Description

4Piston Racing Advanced Performance RACE Valve Spring Kit - K-Series4Piston Racing is proud to introduce a superior valve spring at a competitive price point. Many of the K Series valve springs currently on the market were developed so long ago that they did not consider the RPM range and camshaft size of today's Honda K Series performance engines. 4Piston Racing has developed this valve spring kit with high purity large diameter wire so that you can run any of the popular camshafts on the market and operate the

4Piston Racing is proud to introduce a superior valve spring at a competitive price point.  Many of the K-Series valve springs currently on the market were developed so long ago that they did not consider the RPM range and camshaft size of today's Honda K-Series performance engines.

4Piston Racing has developed this valve spring kit with high purity large diameter wire so that you can run any of the popular camshafts on the market and operate the engine at higher RPM without the risk of valve float. It features their nitriding treatment and Pro Polish to deliver a motorsport grade spring that will withstand rigorous endurance applications. The retainers are a premium Titanium manufactured right here on their Mazak SYNCREX Swiss lathe to tolerances that only this type of premium equipment can achieve. You will be happy with the packaging and presentation, and even happier with the performance and longevity. This is the spring that you will find in 4Piston Racing's highest level endurance race engines.

100% MADE IN USA

Seat Pressure - 120 lbs.
Max Lift - .650" (16.5mm)

**4P has had some questions and comments regarding the higher seat pressure of these as opposed to other lower pressure offerings on the market. The whole reason they made this product was because those lower pressure springs are insufficient to control the valve. 4P's higher pressure spring is made to make your valvetrain last LONGER.**

The Kit Includes the Following:

  • 16 Pro Polished Dual Valve Springs
  • 16 Spring Seat Locators
  • 16 Titanium Retainers

You can use any 7 degree valve lock (keeper) with these retainers. OEM, Ferrea, Supertech, or 4P.

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: 20117408216

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4.0 ★★★★★
Based on 17 reviews
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T
Verified Purchase
T Harris
Grantham, US
★★★★★ 5
Otta sight-- outta mind
Great bracket!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
R
Verified Purchase
Randy Lowry
Grantham, US
★★★★★ 5
HP G5 Dock Mount
Works as advertised! I purchased this as a test piece for our office supplied computers. It frees up space in the desk nd hides unsightly cords from view. I have it wall mounted behind the monitors and am very pleased thus far!
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Reviewed in the United States on December 14, 2025
A
Verified Purchase
Alyssa Lynne
Waukegan, US
★★★★★ 5
Necessity
After the disorganization of my working space drove me crazy, I did an overhaul. This was one of the additions that I bought to not only give me more space but also allow for better cable management. I mounted mine under my desk, which let me contain the cable chaos beneath the desk.
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Reviewed in the United States on November 25, 2025
C
Verified Purchase
Cody
Alexandria, US
★★★★★ 5
Fits great.
Multiple iterations of this dock have wires coming out both the front and back, making it ugly on the desk and no way to hide wires well. Mounting under the desk with this helped a ton, looks way better. Perfect fit.
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Reviewed in the United States on December 12, 2025
Z
Verified Purchase
Zachary Cohen
Carnegie, US
★★★★★ 5
High-quality, high-value
Color: Black, Size: Fits Desk Leg: 80mm(D) x 50mm(W)
I was looking for something similar for my Uplift Desk for a long time, and gave up until I built a new computer and had a reason to resume the search. Seriously, this desk mount is top-tier; I'm coming out of a long drought to review this product. The build quality, strength and stability is impressive, and assembly is easy. I'm confident that the stand could hold my body weight, let alone a computer. The appearance of the finish is high-quality, and color matches the coated steel frame of the Uplift desk flawlessly. In terms of possible areas of improvement, I'd love to see a tighter vertical fitment of the top bracket's sliding arm, and I'd love if there were more rubber anti-slip pads and spacers of different shapes and sizes included. I ended up double-stacking the anti-slip pads, using superglue to adhere them to each other, to give my PC more breathing room on its underside. I'd also love to have the option to select different sizes of base plates.
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Reviewed in the United States on May 7, 2026

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