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Manley Performance

Manley Performance

Manley NexTek Valve Springs 221446SF-16 Springs, NexTek, Dual, 1.400 in. O.D., 575 lbs./in. Rate, 1.150 in. Coil Bind Height, Set of 16

SKU: MAN221446SF-16

Valve Springs
Manley NexTek Valve Springs 221446SF-16 Springs, NexTek, Dual, 1.400 in. O.D., 575 lbs./in. Rate, 1.150 in. Coil Bind Height, Set of 16
Manley Performance

Manley Performance

Manley NexTek Valve Springs 221446SF-16 Springs, NexTek, Dual, 1.400 in. O.D., 575 lbs./in. Rate, 1.150 in. Coil Bind Height, Set of 16

SKU: MAN221446SF-16

Valve Springs
A$2,047.39
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

From drag strips to short track and endurance circuits, the Manley NexTek® series is engineered for serious racers. NexTek® springs resist pressure loss and valve-train degradation even in the most demanding race conditions. That means more consistent spring force deep into a run, reduced valve bounce, and improved overall stability for high-RPM performance. Built to outperform and outlast in real-world competition.

Part Type

Engine Valve Spring Kit

Data: v4.2 - Upd: 2026-10-14 10:09:08

Features

  • No degradation of spring pressure in the later stages of a race
  • Specially processed premium-grade chrome silicon that is virtually free of impurities or surface irregularities
  • Tested by leading engine builders and are confirmed to be the best performing valve springs on the market today

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
221446SF-16
Product Attributes - Part Type
Valve Springs
Product Attributes - Product Line
Manley NexTek Valve Springs
Product Attributes - UPC
807298071138
Product Attributes - Valve Spring Style
Standard
Product Attributes - Number of Springs Per Valve
Dual
Product Attributes - Maximum Valve Lift (in.)
0.800 in.
Product Attributes - Retainers Included
No
Product Attributes - Outside Diameter of Outer Spring (in.)
1.400 in.
Product Attributes - Coil Bind Height (in.)
1.150 in.
Product Attributes - Damper Spring Included
No
Product Attributes - Spring Rate (lbs./in.)
575 lbs./in.
Product Attributes - Inside Diameter of Inner Spring (in.)
0.700 in.
Product Attributes - Locks Included
No
Product Attributes - Valve Stem Seals Included
No
Product Attributes - Valve Springs Coated
No
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold as a set of 16.
Product Attributes - Notes
0.800 in. maximum lift. Super finished spring. Designed for Circle Track applications. Gram weight 125g.

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man221446SF-16
SFX Item ID 4930120
Supplier Item Code 4930120
Manufacturer SKU 221446SF-16
Manufacturer UPC 807298071138

Compatibility

Application Data
  • Installed Height (in.)2.050 in.
    Seat Pressure at Installed Height (lbs.)240 lbs.
    Open Height (in.)(application)1.250
    Open Pressure (lbs.)700 lbs.

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