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For a 6spd car, I think the best you can do is about 820-850 with a ported 1900, 5", 103, aftermarket heads, big cam, e85 (assuming stock displacement). Need NOS or a 2650 to get there in my opinion. But once you are at 1k, you really need more reinforcement in the block and rods/pistons. So you might as well bump the displacement and also buy a 2650.
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2017 ZL1 M6 Black | Maggie 2650 // 103TB // Big Gulp
Past Rides-
2014 ZL1 M6 Red Hot | Tons of mods
2004 CTS-V M6 Silver | Many mods
1995 Corvette M6 Torch Red | A few more mods
1992 Camaro M5 White | A few mods
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