After some research I found these springs to upgrade my L31 engine without having to modify the heads and raise up to .0550". I am so impressed with the design of these springs and they allow my engine to rev freely in the redline.
Magnetic Oil Drain Plug Bolt With Gasket Washer Seal Included - PitVisit Reusable Aluminum Plug (M14 X 1.5, Silver) For Optimal Engine Maintenance
17 Review
Synthetic engine oil MOBIL 1 FS X1 5W-50, 4 l, 4 kg, 1 piece
14 Review
Smartphone Google Pixel 6 Pro 12/256 GB USA, nano SIM+eSIM, stormy black
66 Review
Robot vacuum cleaner Roborock S7 with self-cleaning base RU, white
22 Review