Find aftermarket engine and performance parts for your Peterbilt 379 and maximize your rig's efficiency. You can find everything from turbochargers and tuners to heavy-duty fuel systems and exhaust components. In fact, this product line covers all of the essential needs when it comes to your engine. Tailor your truck's output, fuel economy, and overall performance with parts that are designed to perfectly fit your Caterpillar, Detroit Diesel, or Cummins engine.