Trick Flow Double platinum .660 LS dual valve spring and retainer kits are designed to provide maximum performance and reliability for your LS-based build. All components are made from a proprietary blend of alloys and tested under rigorous conditions to ensure that they perform and last at the highest levels. These racing valve springs are made with cutting-edge material and processing advancements.
The retainers are available in titanium or chromoly steel and are precision machined to reduce unnecessary weight. The kits are designed for drop-in installation into any standard LS-style heads with no machining and include all necessary components and work with most hydraulic roller valvetrains.
Whether you use them in your street or race machine, Trick Flow® Double platinum .660 LS dual valve spring are built to perform and will help get the most out of your LSX.
Note: Commonly used with Gen. 3 and Gen. 4 Chevy LS engines. Fits cathedral and rectangle port heads other than LS9. Can be used with LS7 with .045 in. shims.
Specs:
Valve Spring Style: Standard
Number of Springs Per Valve: Dual
Retainers Included: Yes
Retainer Material: Titanium
Outside Diameter of Outer Spring (in.): 1.304 in.
Coil Bind Height (in.): 1.015 in.
Damper Spring Included: No
Spring Rate (lbs/in.): 392 lbs./in.
Inside Diameter of Outer Spring (in.): 0.950 in.
Inside Diameter of Inner Spring (in.): 0.694 in.
Locks Included: Yes
Lock Material: Steel
Lock Groove Quantity: 1-groove
Lock Style: 7 degree
Valve Stem Seals Included: Yes
Valve Springs Coated: No
Valve Stem Diameter (in.): 0.315 in.
Valve Stem Diameter (mm): 8.00mm
Remanufactured: No
Quantity: Sold as a kit.
Notes: Commonly used with Gen. 3 and Gen. 4 Chevy LS engines. Fits cathedral and rectangle port heads other than LS9. Can be used with LS7 with .045 in. shims.
