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Cosworth High RPM Single Valve Spring Set ( Part Number:COS1 20000166)

Cosworth High RPM Single Valve Spring Set - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)

MODEL # COS1 20000166
Manufacturer Part # 20000166

$286.29

MSRP: $400.00

24
hours
In stock! Ships same day
Qualifies for free shipping!


Description

Cosworth High RPM Vale Springs are the result of countless hours of engineering, testing and validation ensuring the best possible spring for high performance applications. Cosworth High RPM Valve Springs are wound from the world's finest Japanese Kobe steel and feature dual chamfered ends to reduce wear on seats and retainers. Each spring has been engineered with increased seat pressure along with higher lift capability for optimum performance potential and improved valve control. Single spring design allows easy installation with no machining required and is perfect for typical high performance use.

Key Features:
Manufactured from the finest Japanese Kobe Steel
Single spring design for easy installation
Dual chamfered ends
Increased performance
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Specifications


Brand: Cosworth
Head Alteration Required: No
Inner Valve Spring: No
Location: Intake and Exhaust
Machining Required: No
Retainers: Not Included

Mfgr. Warranty: No Warranty
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days


Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
Standard

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RallySportDirect.com Reviews:

  • Q: RPM limit with these springs?  simon.gagnon17797 10 months ago

    Answer

    What is the maximum RPM limit with these spring and 272 cams?


    • A: It honestly depends on all of your modifications. I would consult a tuner/machine shop for exact ranges.


      Tyler A. 10 months ago
  • Q: High RPM vs Dual Valve w/ Retainers  Demonik 4 years ago

    Answer

    Hello RSD Team, I was considering parts for my engine build and the springs were one of the components I was looking to replace. Would you please help me out with the following questions - 1. What is the difference between this and the COS1 KK3839? 2. Why would I not require replacing the retainers as well if I were replacing only these springs? 3. Would there be a possibility of buying and replacing the retainers as well along with these spring? Thanks guys!


    • A: These springs are made specifically for high RPM use and one spring will be used per valve. COS1 KK3839 uses two springs per valve and are more suitable for very aggressive cams. It is recommended, but not necessary to replace the stock retainers. We are able to special order Cosworth retainers separately, or you can use any stock replacement retainer.


      Zach G. 4 years ago
  • Q: Beehive shape?  Sasuke83 4 years ago

    Answer

    You said: Beehive shape allows use of original lightweight alloy retainer, but on the pictures it doesn't look like a beehive shape. Is it really a beehive shape (no way to find it on Cosworth website) or is it a classic helical shape? Thank you


    • A: These springs are just a standard square wind where the top and bottom of the spring are the same size.


      Kirill C. 4 years ago
    • A: So why is it written Beehive shape in the description of this product in your website?


      Sasuke83 4 years ago
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WRX STI Limited
2007 Subaru Impreza WRX STI Limited
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2011 Subaru Impreza WRX STI Limited Hatchback
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2014 Subaru Impreza WRX STI Limited Hatchback
WRX STI Limited Sedan
2011 Subaru Impreza WRX STI Limited Sedan
2012 Subaru Impreza WRX STI Limited Sedan
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2014 Subaru Impreza WRX STI Limited Sedan
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2011 Subaru Impreza WRX STI Sedan
2012 Subaru Impreza WRX STI Sedan
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