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-1449 POLISHED

Part Type

Engine Valve Spring Kit

• 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

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	ico98522DJ	98522DJ	00840103423715	ICON 21-23 Ford F150 Tubular UCA DJ Pro Kit
	1x	ico97721P	97721P	840103425726	ICON 21-23 Ford F150 Tremor 4WD Rear 2.5 Series Shock VS PB - Pair
	1x	ico91824	91824	840103425665	ICON 21-23 Ford F150 Tremor 2.5-3in 2.5 Series VS RR 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 3 SUSPENSION SYSTEM W TUBULAR UCA