Valve Spring

The Manley Professional Series Valve Springs are engineered for serious performance builders and racers who demand reliable high-RPM control and long-lasting durability. Built from premium chrome-silicon and H-11 tool steels with precision heat treatment and shot-peening, these springs deliver robust tension and fatigue resistance across demanding applications ranging from oval track to the drag strip. Designed to maintain consistent spring pressure and minimize valve float under extreme load, they help keep your engine responsive and controlled when it matters most

Additional Information

Manley Valve Spring, SPRING-SBC 1.250

Part Type

Engine Valve Spring Kit

• Chrome silicon material
• Designed for oval track and drag racing

This is a group bundle consisting of:

Image	Qty	SKU	MFR SKU	UPC	Description
	1x	ico98523DJ	98523DJ	840103423722	ICON 21-23 Ford F150 Billet Front Upper Control Arms DJ Pro Kit
	1x	ico97720CP	97720CP	00840103407388	ICON 04-08 Ford F-150 4WD / 2009+ Ford F-150 2/4WD Rear 2.5 Series Shocks VS PB CDCV - Pair
	1x	ico91825C	91825C	00840103423692	ICON 21-23 Ford F150 4WD 3in Lift 2.5 VS RR CDCV 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

21-24 FORD F150 4WD 2.75-3.5" STAGE 4 SUSPENSION SYSTEM BILLET CDCV