i have a pair of 454 mercs that are 400 hp each what is the easiest way to get more hp out of them for the money looking get around 500 hp to 600 hp out of them or maybe this not realistic help me out thanks

Might have to upgrade drives if you go up to much power, if they are bravo 1 you are maxed all ready

They are TRS drives

Bolt on a set of 177 blowers and your done ...

might want to find a new drive bldr

ran 750 & 900 hp thru Bravos , & 1000 hp thru Teague Platinum plus never broke a one ...