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When a single valve spring isn’t enough. High-performance, high-revving K-Series applications may need a dual valve spring to produce adequate seat pressure, open pressure, and spring rate for the camshaft of choice. This Supertech kit does just that with springs producing seat pressure of 95 LBS and 261 LBS of pressure fully open. The provided ultra-light titanium retainers, combined with the springs, help the valves snap back to their seated position, eliminating valve float.  

This kit comes with 16 of each: dual valve springs, retainers, and seat locators. Supertech springs are made from Super Clean Chrome Silicone Vanadium Steel Alloy. This material is selected for its ability to handle high stress, but also the ‘memory’ to compress and return to form, time after time, cycle after cycle.    

Fitment:

Fits these engines: 
  • F20C 
  • F22C 
  • K20A 
  • K20A2 
  • K20Z1  
  • K20Z3 
  • K24A2 
  • K24Z3   

Detailed Fitment:

  • S2000 2000-2005
  • S2000 2006-2009
  • Civic Si 2002-2005
  • Civic 2001-2005
  • Civic Si 2006-2011
  • Civic 2006-2011
  • RSX 2002-2006
  • RSX Type S 2002-2006
  • TSX 2004-2008
  • TSX 2009-2014

Technical details:


Seat Pressure: 95 @ 40.4 

Open Pressure: 261 @ 12 
Max Lift: 15.3mm 
Coil Bind: 22.7mm 
InnSpr.ID: 15.50mm 
Rate: 13.2 
Kit spring: SPR-H1021D 
Kit spring qty: 16 
Retainer: RET-K20A2/T2 
Retainer qty: 16 
Seat Locator: SEAT-H1020DS 
InnSpr.OD: 21.30mm 
OutSpr.OD: 30.00mm 
OutSpr.ID: 21.80mm 
Seat Locator qty: 16   


Included:


(16) Springs: SPR-H1021D 

(16) Retainers: RET-K20A2/T2 
(16) Seat locators: SEAT-H1020DS   



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