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Your cart is empty.Brand New Lunati .660" Max Lift Hydraulic Roller Dual Valve Spring Kit for a GM LS-Series V8 Engine (LS1/LS2/LS3/LS6/LS7). 8mm Valve Stem Size, 7º Lock Angle, Single Valve Groove Type. Kit Part #73925K1. Kit Includes: #73925-16 Dual Valve Springs (Specs below) #75793-16 Retainers #77123-16 Valve Locks #86873-16 Spring Seats. Valve Spring Specs: Outside Diameter (Outer): 1.306" Inside Diameter (Inner): .676" Max Lift: .660" Seat Load: 153 @ 1.810" Open Load: 400 @ 1.150" Coil Bind: 1.100" Spring Rate (lbs/inch): 379 lbs/in Racers and engine builders of LS Series GM engines now have a brand new, extreme usage (.660" Max Lift) Valve Spring, Spring Retainer, Valve Lock and Valve Stem Seal Kit that safely extends engine RPM and boosts performance capability with normally aspirated or power-added LS engines. Lunati’s new kits 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 valve springs in each kit are carefully tension matched and all supplied components come complete and ready to install. Included are Lunati’s CNC machined, steel alloy spring retainers, CAD designed to deliver maximum strength and durability. Precision fit spring locators are also included, and are cleverly designed to accurately locate the inner spring, preventing abrasion with aluminum LS Series heads. Precision-machined 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.
Mathew nofsinger
Reviewed in the United States on April 28, 2021
I had a shop put them I didn't think about it while I was putting the engine together mine were silver tho not gold as advertised still worth it they weren't missing any thing
The Cox Family
Reviewed in the United States on March 16, 2020
They are more spring than needed for the "Sloppy Stage 2" cam, but I had no issues with install, packaging, anything. It's a great double-spring for any LS.
Scotty Collins
Reviewed in the United States on January 10, 2020
Perfect. Chrome plated. Should last forever.
Angel C.
Reviewed in the United States on January 23, 2019
Genuine lunati product with great quality. Installed them same day they arrived. Installed easy and ran awesome. Hinson Motorsports shipped nice and fast! Thumbs up for sure.
chris
Reviewed in the United States on September 11, 2018
just installed with no issues, glad thing i did. at 85k miles my old seals were starting to break up and showed wear. had no installation issues.
Chris V
Reviewed in the United States on January 21, 2018
The product is great until I got down to the last spring to install and found out that I was missing one valve spring retainer. That didn't make me happy. Hopefully I can get this retainer asap. The product is great so I will give it a great rating. Unfortunately human error occurred when bagging parts.
Danny Winter
Reviewed in the United States on April 10, 2018
Came packaged amazingly , every bag labeled so you knew the contents and very easy to install!
CARLOS HERNANDEZ
Reviewed in the United States on March 27, 2015
Awesome could not be happier great quality . Just because the retainers are not titanium they are still as light forged steel .
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