About This Product
PAC Racing Valvetrain Components
LS Valve Springs .550" Lift
Upgrade your LS engine's valve springs with this complete set of 16 PAC Racing valve springs, rated for camshafts with up to .550" of lift. Part number PAC-2568 is a direct drop-in replacement for stock GM springs and is a go-to choice for street performance cam swaps including Chopacabra and similar stage 1-2 camshaft builds.
Direct Drop-In Upgrade A popular spring upgrade for LS street builds needing more lift capacity than stock without jumping to an extreme-duty setup.
Cam Swap Ready Ideal for common stage 1-2 LS camshaft upgrades where factory springs are no longer enough for safe high-RPM operation.
Part Number
- PAC Racing: PAC-2568
- Replaces GM 12713265
Quantity Included
- Set of 16 valve springs
- Complete set for one V8 engine both cylinder heads
Engine Compatibility
- Fits GM Gen III and Gen IV LS-based V8 engines with up to .550" camshaft lift
- 4.8L LR4, LM4
- 5.3L LM7, L59, LH6, LC9, LMG
- 5.7L LS1
- 6.0L LQ4, LQ9, LY6, L96
- 6.2L LS3, L92, L9H, L94
Common Engine Codes
- LS1, LS2, LS3, LS6
- LR4, LM4, LM7, L59, LH6, LC9, LMG
- LQ4, LQ9, LY6, L96
- L92, L9H, L94
Vehicle Fitment
- 1997-2013 Chevrolet/GMC Silverado & Sierra 1500, 2500, 3500
- 1997-2013 Chevrolet Tahoe, Suburban / GMC Yukon, Yukon XL
- 1997-2013 Chevrolet Avalanche
- 1997-2002 Chevrolet Camaro / Pontiac Firebird LS1
- 2004-2006 Pontiac GTO LS1, LS2
- 2005-2013 Chevrolet Corvette LS2, LS3
- 2010-2015 Chevrolet Camaro SS LS3
- Custom LS swap applications
Performance Benefits
- Required when installing a performance camshaft that exceeds stock lift
- Helps prevent valve float at higher RPM
- Helps avoid coil bind and retainer-to-seal contact
- Excellent match for street performance cam swaps
Important Fitment Notes
Anytime you install a performance camshaft exceeding stock lift specifications, upgraded valve springs are required for safe and reliable operation.
- Designed for camshafts with up to .550" lift
- Common choice for Chopacabra and similar stage 1-2 camshafts
- Helps prevent valve float, coil bind, and retainer-to-seal contact
- Verify your complete valvetrain combination before installation
Installation Notes ›
- Professional installation recommended
- Ideal for street performance cam swaps
- Works well in stage 1-2 LS camshaft combinations
- Best results when paired with proper supporting valvetrain components
Note:
These PAC springs are a popular high-performance upgrade for LS cam swaps needing support up to .550" lift while maintaining strong street reliability.
