stock springs are blue or yellow so it should be easy to tell what is stock vs aftermarket
ls3 spring specs:
From the GMPP catalog
12586484
Valve Springs (not shown)
• Beehive style springs • Standard LS6/LS3 springs
• Use cap P/N 10166344 • 1.250" @ 295 lbs. pressure
• 1.800" installed height • Max lift .570"
@ 90 lbs. pressure
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2010 2SS/RS
Z/28 intake, NW, FAST 102, speed engineering LT's, some exhaust, ATI -10% pulley, GM flex fuel injectors, DSX flex fuel sensor, MGW shifter, HP Tuners, some suspension work, stickers and a little weight loss. 12.63 @113.53
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