2001-2009 Chevy 5.7L/6.0L Pro LS Valve Springs, LS6 Style, 375 Lbs Spring Rate | Summit Racing SUM-174002

1997-2019 Chevy LS 4.8L-7.0L Valve Spring Upgrade Kit, 1.300 OD Dual Springs, Retainers/Locks, Seals | Summit Racing SME-174003

2001-2009 Chevy 5.7L, 6.0L Pro LS Valve Springs, 310 Lbs/In, Single Spring, Set Of 16 | Summit Racing SUM-174004

2001-2009 Chevy Small Block LS Valve Springs, 340 Lbs/In, .630 Max Lift, 1.300 O.D., Set Of 16 | Summit Racing SUM-174005

Trick Flow Specialties TFS-2500287P: Trick Flow Double Platinum .660 LS Dual Valve Spring And Retainer Kits

BTR Gen III/IV LS Beehive Valve Spring Kit - .625 Lift

Howards Cams 98118: Howards Cams LS Dual Valve Springs

BTR Gen III/IV LS Dual Platinum Valve Spring Kit - .660 Lift

Texas Speed LS Dual Polished Valve Spring Kit W/ Titanium Retainers - .660 Lift

Trick Flow Double Platinum 0.660 LS Dual Valve Springs & Titanium Retainers

Brian Tooley Racing .625 Max Lift Beehive Valve Spring Kit For GM LS

660" Dual Valve Spring Kit Titanium Fit For Lsx Ls1 Ls2 Ls3 Lq4 Lq9