does anyone offer exhaust modification or tuned replacements? merc lists different model and hp size exhaust part #'s, unlike hydrotec yamaha, the merc is harder to find aftermarket upgrades for, ive got the 50 i removed all the restrictive intake air parts, with 3 38mm carbs, and the top end is still restricted from the exhaust, the 60 for 2004 has 3 different exhaust choices from the jet to the option loaded model, im hoping someone might know more about higher end tuning for this motor
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