All GTE V8s are twin turbo flat plane. The GT3 Aston keeps the crossplane crank (probably due to homologation reasons). Also, the GT3 Mercedes-AMG GT still uses the NA 6.2 liter V8 from the SLS-AMG.
The top road going version of the AMG GT uses a flatplane crank, like the Aston Martin GTE does, but with about an extra 200+bhp.
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