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Lunati Dual Valve Spring Kit 73925K2TW

  • TW Valve Spring Kit Contents
  • LS Spring Kit Installed
  • Generic Picture of Kit Contents
  • Seals & Locators Installed
  • Viton Valve Seals
  • Hardened Valve Locks
Your Price:
$307.79 (You save $13.20)
7.00 LBS
Calculated at checkout

Product Description

LS Dual Valve Spring Kit - TFS Twisted Wedge Heads

All top Ford racers and engine builders of small block Ford engines now have a proven, extreme usage valve spring, spring retainer, valve lock and valve stem seal kit designed for the potent TFS Twisted Wedge 170 FAC cylinder heads, that safely extends engine RPM potential and boosts performance capability. This custom built Lunati based kit feature precision wound, heat-set, dual valve springs for required seat and open load pressure plus total spring travel to accommodate cams with aggressive gross valve lifts of up to .660”.

The Lunati spec "LS style" dual valve springs in each kit are carefully tension matched and all supplied components come complete and ready to install. Included are light weight, CNC machined, chromemoly steel alloy spring retainers which are CAD designed to deliver maximum strength and durability. Fully machined, precision fit spring locators are included and are specifically designed for Twisted Wedge heads to accurately locate the inner spring to the valve guides, preventing excessive movement and abrasion with aluminum heads. CNC machined and hardened 4140 steel alloy 7-degree valve locks are also provided for superior valve stem holding reliability. Premium quality, Viton steel reinforced valve stem seals are included for correct valve stem lubrication and oil control.

Application: Developed for TrickFlow Specialties Twisted Wedge 170 & 190 FAC cylinder heads with 11/32" valve stems only.

Valve Spring Specs:

  • Outside Diameter: 1.306"
  • Inside Diameter: 0.676"
  • Max lift at the valve: .660"
  • Seat load: 153 lb/in at 1.810"
  • Open load: 400 at 1.150"
  • Rate: 379 lb/in
  • Coil bind: 1.100"




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Product Reviews

  1. Lunati Dual Valve Spring Kit 73925K2TW 5 Star Review

    Posted by on 22nd Jul 2020

    Excelente calidad . Menor peso . Comparado con los muelles originales de la trick flow 170cc . . Funcionan segun esperado.

  2. Great upgrade! 5 Star Review

    Posted by on 22nd Mar 2019

    Great upgrade over the stock TF springs or even the Trackheat upgrade. High quality components matched perfectly. The weight savings are tremendous. Very pleased.

  3. The best out there!!!! 5 Star Review

    Posted by on 10th Jan 2014

    Very nice kit for Trickflow heads. I weighed the difference between my old stock Trickflow springs and these, and the difference was drastic! A must for these heads!!!!

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