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  1. Truggies - Nitro
    Hi there, Ive had my HPI Trophy 4.6 Truggy for nearly two years now, and I'm slowly starting to do some upgrades. Im in the middle of upgrading the servos and a 3-shoe clutch. I wanted to upgrade the exhaust, but i wanted to know a few things: - Does a new pipe affect the overall performance...
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