Valve Spring

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.

Additional Information

Manley Valve Spring, SPRING-1.500 DOUBLE

Part Type

Engine Valve Spring Kit

• Accepts smaller, lighter retainers which also promotes higher revs
• Dual spring design reduces friction, which generates less heat and translates into greatly reduced load loss
• Extensively tested on the Spintron, dyno and race track (including blown nitro engines) and proven highly effective
• Higher natural frequency and lower active mass provides improved valvetrain control and higher RPM potential
• Smaller diameter, lightweight dual design allows engine to rev higher with improved valve train control
• Ultra clean, high tensile strength chrome silicon material

This is a group bundle consisting of:

Image	Qty	SKU	MFR SKU	UPC	Description
	1x	ico94000	94000	00840103425672	ICON 21-23 Ford F150 4WD Front Knuckle Kit
	1x	ico93500	93500	00840103414508	ICON 2015+ Ford F150 / 2017+ Ford F250/F350 IIC Intelligent Control Install Kit
	1x	ico98522DJ	98522DJ	00840103423715	ICON 21-23 Ford F150 Tubular UCA DJ Pro Kit
	1x	ico97721EP	97721EP	840103425719	ICON 21-23 Ford F150 Tremor 4WD Rear 2.5 Series Shock VS PB CDEV - Pair
	1x	ico91824E	91824E	840103425696	ICON 21-23 Ford F150 Tremor 2.5-3in 2.5 Series VS RR CDEV Coilover Kit

Bundled group items may ship from multiple locations and could have slightly longer transit times if parts are sourced from different warehouses.

Images in this listing may include individual and/or group shots of the products included in the bundle. Please refer to the table to see a breakdown of what is included. Click on a SKU to see individual item details.

For details on the individual components in this bundle, click here.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

LIFT KIT W TUBULAR UCA 21-23 FORD F150 4WD 3.5-4.5" STAGE 5 SUSPENSION SYSTEM W TUBULAR UCA