Engine Upgrades and Replacement Parts. If you're searching for off road performance parts such as cold air intakes, engine dress up kits, snorkels, and more, then look no further! We stock the hottest engine performance parts from the most trusted manufacturers such as AFE, K&N, Airflow American and Safari Snorkel, Rugged Ridge and more. Check out our large selection of engine replacement parts for Weekend Warrior, Expedition, or Overland vehicle building.