Supertech 12mm Max Lift Conical Spring Kit | Multiple BMW Fitments (SPRK-FE20N54-BE)

Supertech
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BMW N54/N55/S55 Turbo Conical Spring Kit - Set of 24 by Supertech

Supertech Spring / Retainer kits are precision matched sets for a complete valvetrain overhaul. Developed for the performance enthusiast that wants the best the industry has to offer, Supertech Spring / Retainer kits are second to none in terms of performance, quality and value.

Features

  • InnSpr.OD: 21mm
  • InnSpr.ID: 14.2mm
  • Seat Pressure: 75 @ 36.5
  • Open Pressure: 155 @ 10
  • Max Lift: 12mm
  • Coil Bind: 23.2mm
  • Rate: 8
  • Kit spring: SPR-FE20BE
  • Retainer: RET-BMN54-TI (5mm) / RET-BMN54-TE (6mm)
  • OutSpr.OD: 24.4mm
  • OutSpr.ID: 17.6mm

Benefits

  • Underwent a gas nitriding process before shot peening for improved fatigue life

Please Note: Use Factory Valve Stem Seal

Applications

  • 2007-2010 BMW 135i
  • 2006-2010 BMW 335i
  • 2011-2013 BMW 335is
  • 2007-2010 BMW 535i
  • 2008-2012 BMW 740i
  • 2008-2010 BMW X6
  • 2009-2016 BMW Z4

What's In The Box?

  • 24 - Springs
  • 24 - Retainers

Warranty

  • Due to the nature of the application, these parts are sold without any express warranty or any implied warranty of merchantability, or fitness for a particular purpose.

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