Manley Small Block Chevy LS Series 1.335 Double NexTek High Perf Valve Springs

SKU: MAN221422-16

Valve Springs

MAN Valve Spring Kits...

Manley Performance

Manley Small Block Chevy LS Series 1.335 Double NexTek High Perf Valve Springs

SKU: MAN221422-16

Valve Springs

MAN Valve Spring Kits...

Last Available from MFR. LAST ONE AVAILABLE from the manufacturer's distribution centre. Once sold, this item may not be immediately available again. The dispatch timeframe shown is an estimate based on historical orders for this part and is dependent on the manufacturer releasing the final available unit.

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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: 2026-10-13 17:07:35

Features

Manufactured from “super clean” Hi-Tensile Chrome Silicon steel
Proprietary multi-step heat treating minimizes load loss
Shot-peened to MIL spec for max fatigue life
Tightly controlled open-end flatness reduces valve stem side loading
Tip thickness designed to eliminate overload breakage

Specifications

Product Attributes - Brand: Manley
Product Attributes - Manufacturer's Part Number: 221422-16
Product Attributes - Part Type: Valve Springs
Product Attributes - Product Line: Manley NexTek Valve Springs
Product Attributes - UPC: 807298082134
Product Attributes - Valve Spring Style: Standard
Product Attributes - Number of Springs Per Valve: Dual
Product Attributes - Maximum Valve Lift (in.): 0.780 in.
Product Attributes - Retainers Included: No
Product Attributes - Outside Diameter of Outer Spring (in.): 1.335 in.
Product Attributes - Coil Bind Height (in.): 0.960 in.
Product Attributes - Damper Spring Included: No
Product Attributes - Spring Rate (lbs/in.): 780 lbs./in.
Product Attributes - Inside Diameter of Outer Spring (in.): 0.907 in.
Product Attributes - Inside Diameter of Inner Spring (in.): 0.622 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: Valve springs are super finished.

Reference Information

Brand Name/s	Manley Performance
StreetFX SKU	man221422-16
SFX Item ID	4060439
Supplier Item Code	4060439
Manufacturer SKU	221422-16
Manufacturer UPC	807298082134

Compatibility

Application Data

Make	CHEVROLET
Beginning Year	1997
Ending Year	2004
Engine Type	V8
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Engine Size	5.7L/350
Installed Height (in.)	1.800 in.
Seat Pressure at Installed Height (lbs.)	270 lbs.
Open Height (in.)(application)	1.020 in.
Open Pressure (lbs.)	870 lbs.

Make	CHEVROLET
Beginning Year	1999
Ending Year	2014
Engine Type	V8
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Engine Size	5.3L/325
Installed Height (in.)	1.800 in.
Seat Pressure at Installed Height (lbs.)	270 lbs.
Open Height (in.)(application)	1.020 in.
Open Pressure (lbs.)	870 lbs.

Make	CHEVROLET
Beginning Year	1999
Ending Year	2017
Engine Type	V8
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Engine Size	4.8L/294
Installed Height (in.)	1.800 in.
Seat Pressure at Installed Height (lbs.)	270 lbs.
Open Height (in.)(application)	1.020 in.
Open Pressure (lbs.)	870 lbs.

Make	CHEVROLET
Beginning Year	1999
Ending Year	2019
Engine Type	V8
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Engine Size	6.0L/364
Installed Height (in.)	1.800 in.
Seat Pressure at Installed Height (lbs.)	270 lbs.
Open Height (in.)(application)	1.020 in.
Open Pressure (lbs.)	870 lbs.

Make	CHEVROLET
Beginning Year	2006
Ending Year	2015
Engine Type	V8
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Engine Size	7.0L/427
Installed Height (in.)	1.800 in.
Seat Pressure at Installed Height (lbs.)	270 lbs.
Open Height (in.)(application)	1.020 in.
Open Pressure (lbs.)	870 lbs.

Make	CHEVROLET
Beginning Year	2008
Ending Year	2017
Engine Type	V8
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Engine Size	6.2L/376
Installed Height (in.)	1.800 in.
Seat Pressure at Installed Height (lbs.)	270 lbs.
Open Height (in.)(application)	1.020 in.
Open Pressure (lbs.)	870 lbs.