Review on π§ High-Quality GM Parts 12499224 Valve Spring for LS1 Engine - Optimal Performance Guaranteed! by Noah Smith
fantastic upgrade. My 4.8L LS can now really step on the gas!
My master said you need this and he was right. I can rev my 4.8 at over 6500 rpm with stock rockers and a soft cam. Before that there were float valves at about 5800.
- feathers
- boring packaging
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