PAC Stage 2 Valve Springs for the 4.6L / 5.4L 3 Valve Head
Estimate delivery times: 3-6 days (United States).
Return within `15 days of purchase. Duties & taxes are non-refundable.
Guaranteed Safe Checkout
If you're running an aftermarket cam in your 4.6L or 5.4L 3-valve engine, these PAC Stage 2 springs are exactly what your build needs. They deliver the valve control and reliability that separates a solid cam upgrade from a truly dialed-in power plant, with 105 lbs of seat pressure and 270 lbs at full lift to keep everything in check through aggressive valve events.
The best part? These drop straight in without any machine work. They play nice with your stock retainers and seals, so you're not looking at a complete valvetrain overhaul just to unlock your cam's potential. With a 300 lb/in rate and support for up to .550" of lift, you've got the headroom to maximize flow and acceleration gains without sacrificing reliability.
PAC Racing manufactures these right here in the USA, and they're the exact same springs trusted in their performance cylinder head packages. If you're serious about getting everything your aftermarket camshaft has to offer, this is the foundation that makes it happen.