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Manley Performance

Manley Performance

Manley NexTek Valve Springs 221448P-16 Springs, Triple, 1.677 in. Outside Diameter, 733 lbs./in. Rate, 1.142 in. Coil Bind Height, Set of 16

SKU: MAN221448P-16

Valve Springs
Manley NexTek Valve Springs 221448P-16 Springs, Triple, 1.677 in. Outside Diameter, 733 lbs./in. Rate, 1.142 in. Coil Bind Height, Set of 16
Manley Performance

Manley Performance

Manley NexTek Valve Springs 221448P-16 Springs, Triple, 1.677 in. Outside Diameter, 733 lbs./in. Rate, 1.142 in. Coil Bind Height, Set of 16

SKU: MAN221448P-16

Valve Springs
A$2,188.53
Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.
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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 10:12:07

Features

  • Available in polished versions to reduce friction, improve fatigue life, and minimize load loss
  • Better valve train stability and component life
  • Ideally suited for Sportsman Drag Racing applications
  • Specially processed premium-grade chrome silicon that is virtually free of impurities or surface irregularities

Specifications

Product Attributes - Brand
Manley
Product Attributes - Manufacturer's Part Number
221448P-16
Product Attributes - Part Type
Valve Springs
Product Attributes - Product Line
Manley NexTek Valve Springs
Product Attributes - UPC
807298023823
Product Attributes - Valve Spring Style
Standard
Product Attributes - Number of Springs Per Valve
Triple
Product Attributes - Maximum Valve Lift (in.)
0.900 in.
Product Attributes - Retainers Included
No
Product Attributes - Outside Diameter of Outer Spring (in.)
1.677 in.
Product Attributes - Coil Bind Height (in.)
1.142 in.
Product Attributes - Damper Spring Included
No
Product Attributes - Spring Rate (lbs./in.)
733 lbs./in.
Product Attributes - Inside Diameter of Inner Spring (in.)
0.635 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
Polished.

Reference Information

Brand Name/s Manley Performance
StreetFX SKU man221448P-16
SFX Item ID 4927395
Supplier Item Code 4927395
Manufacturer SKU 221448P-16
Manufacturer UPC 807298023823

Compatibility

Application Data
  • Installed Height (in.)2.100 in.
    Seat Pressure at Installed Height (lbs.)350 lbs.
    Open Height (in.)(application)1.200
    Open Pressure (lbs.)1,010 lbs.

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