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16° with E85. Not sure what gaskets the tuner runs on the 5.3. It's SBE with aftermarket heads. His truck is race only and he already has a motor to go in it if it blows so he can afford to run 20+. I'm also not running the Texas Mile, which I'm sure is less stress.
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2010 SS - On3 kit with downpipe cutout, CTR 78/80, CompCam 239/251 620/632 122+4, E85, Z28 suspension and ZL1 diff with Outlaw axles. Gen6 ZL1/1LE brakes.
2011 Vert - 416/w 230/236 .612/.602 115lsa, 1LE suspension w/32mm rear bar. Z28 diff. ZL1 brakes.
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