The Empire Performance EPE-VS6601 Stage 1 Valve Springs for your 2001-2010 GM 6.6L Duramax outperform all the competition for drop-in replacement valve springs. These Beehive Valve Springs are a simple drop-in and do not require any extra cylinder head modifications or machining. Great for stock to mild boost up to 70PSI.
110-130 PSI Seat
No Machining Required
Great For Stock & Mild Boost Up To 70 PSI