Trick Flow Cylinder Head Valve Spring Upgrade Kit Mustang 289/ 302/ 351W Cast Iron

Upgrade the cast iron cylinder heads on your Mustang's factory 289, 302 or 351W engine with this Cast Iron Cylinder Head Valve Spring Upgrade Kit TFS-2500100 from Trick Flow. This American-made kit comes with everything you'll need to install a high-performance cam, including valve springs with dampers, Chromoly retainers, valve seals, locks, spring shims and a spring height gauge.

The durable, one-groove steel locks feature a seven-degree lock style, and the springs have a 358 lbs./in. spring rate. Designed to work with hydraulic roller camshafts with a .540-inch maximum lift, this premium-quality kit features a 1.8-inch installed height with a 110 lb seat pressure. Get started on your passion project by upgrading the cast iron cylinder heads on your factory 289, 302 or 351W engine!

Features and Benefits: 
- Standard Valve Spring Style
- 0.341 in. (8.66mm) Valve Stem Diameter
- Durable, Long-Lasting Steel Retainers
- 1.470 in. Outside Diameter of Outer Spring
- 1.075 in. Inside Diameter of Outer Spring
- 0.803 in. Inside Diameter of Inner Spring
- 0.525 in. Valve Guide Diameter
- 358 lbs./in. Spring Rate
- Single Spring Per Valve
- Proudly Manufactured in the USA!

Kit Includes: 
- Valve Springs with Dampers
- Chromoly Retainers
- Valve Seals
- Locks
- Spring Shims
- Spring Height Gauge

Please Note: Includes all parts necessary to do a complete set (pair) of cylinder heads.

Specifications: 
- 1.800 in. Installed Height
- 110 lbs. Seat Pressure at Installed Height
- 1.250 in. Open Height
- 257 lbs. Open Pressure

Tech Tip: Will work with hydraulic roller camshafts up to 0.540 in. lift.