VT VY VY VZ VE Holden Commodore LS1 LS2 LS3 L98 Lunati Dual Valve Spring Kit New

With a maximum lift capability at 0.660-inch, the Lunati kit serves the majority of popular camshaft applications.
The kit is complete with dual valve springs, steel retainers, locks, valve seals and spring locators and represents a drop-in installation for many popular LS applications.

Lunati’s retainers and spring locators are CNC-manufactured from 4140 alloy steel. The locators pilot onto the valve guides and locate the inner diameter of the inner valve springs, preventing them from abrading the springpockets in the aluminum heads.

In common with all dual-spring retainers, these new Lunati types have a group of steps machined into their underside (which locate the upper registers of the valve springs) and a bore machined to accept the 7-degree valve locks.

The locks are equipped with inner bead locks and the 7-degree interference angle between the locks and the retainers is favored by many who believe it causes the locks to clamp the valve stems tighter. Through careful CAD and FEA design efforts, Lunati engineers have developed a new valve spring retainer design using wear-favorable alloy steel, yet nearly matching the weight advantage of Titanium.

For street/strip longevity, Lunati’s lightweight alloy steel retainer is unbeatable. Viton steel-jacketed valve seals complete the kit. The steel jackets ensure the valve stem seals remain tight around the valve guides and also protect the seals should the inner springs come in light contact with them. The Viton material is ideal for resisting heat and oil, particularly some of the more aggressive oil additives that cause ordinary seals to swell and distort.

Specifications:

• Lunati Dual Valve Spring Kit with dual springs, locks, retainers & seals
• Part number 73925K1
• Outside Diameter of Outer Spring (in): 1.306 in.
• Spring Rate (lbs/in): 379 lbs./in.
• 153 lbs. @ 1.810" Seat Load
• 400 lbs. @ 1.150" Open Load
• 0.660" Maximum Valve Lift
• Inside Diameter of Inner Spring (in): 0.676 in.
• Retainers Included: Yes
• Retainer Material: Chromoly steel
• Locks Included: Yes
• Lock Style: 7 degree
• Lock Groove Quantity: 1-groove
• Lock Material: Steel
• Valve Stem Seals Included: Yes, Includes Viton valve seals

WARRANTY: Tuff Car Parts is committed to giving our customers the best buying experience available online when purchasing automotive parts. This includes us proudly supporting all products we sell with our own 12 month warranty. If a part fails and is covered by a manufacturer’s warranty Tuff Car Parts will gladly follow up all warranty claims on your behalf, meaning you can get a replacement as soon as possible without the headache of dealing with warranty departments yourself. Collateral damage is not covered by Lunati, and as such cannot be covered by Tuff Car Parts.