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Now is this 400RWHP or 400FWHP??? Thats what I wanna know! How does GM rate them?
It's rated at the flywheel. The cars are typically putting down 345-355rwhp. Here's a link to a dyno where they put headers on a stock C6 and it made 377rwhp untuned over the stock 355rwhp. Untuned since there is no tuning available yet...