Peterbilt 386 Engine & Performance Parts: Boost your Peterbilt 386?s power and efficiency with top-quality performance parts. From fuel pumps and turbochargers to engine tuners and heaters, this lineup has everything you need to maximize horsepower, improve fuel economy, and enhance engine response. Designed for heavy-duty hauling, these durable parts include options like FASS fuel systems and Bully Dog performance modules. Whether you?re upgrading old components or taking your truck?s performance to the next level, this product line has you covered. Get the most out of your 386 with these reliable, high-performance upgrades!