Whether it’s the XP-320, XP-360, XP-400, or race-proven XP-400SRE, Superior’s XP-Engine series gives airplane and helicopter builders the widest array of models so you can find the perfect engine for your aircraft and your budget.

But no matter which XP-Engine you choose, you are getting an engine that has all of Superior’s industry leading design, manufacturing and performance advancements. Your XP-Engine includes the blending of FAA-approved engine parts and other custom enhancements that are not available on any standard factory engines. So your XP-Engine will deliver a level of safety, reliability, value and performance that is well ahead of anything in its class.

And Superior stands behind the quality of every XP-Engine with the best warranty in the business. Superior warranties your conventional lifter XP-Engine to be free from defects in materials and workmanship for a full ONE (1) YEAR, with an option to purchase additional coverage to increase the warranty to three (3) years. Roller Lifter XP-Series Engines come standard with a THREE (3) YEAR warranty.

Model O-360/IO-360 Specifications