Innovative Performance Chip/Power Programmer for Mercury Grand Marquis 4.6L, 5.0L and 5.8L - Improve Your Fuel Mileage, Save Gas & Gain More MPG, Increase Horsepower & Torque with this Engine Tuner! Boost your Mercury Grand Marquis's horsepower, torque, throttle response and fuel economy with the advanced Innovative Performance Chip! Safely gain up to +35 HP and up to +5 MPG in fuel mileage in your Mercury Grand Marquis by safely optimizing your air/fuel ratio and timing curve for increased efficiency! Easily installs in less than 15 minutes, with absolutely no mechanical experience required! All Mercury Grand Marquis performance chips come with an installation kit, including detailed installation instructions with easy to follow step-by-step pictures! Our award-winning 5 star technical staff is here to guide you and help with any questions that you may have. Makes NO permanent changes to your Mercury Grand Marquis's computer! It will not void your Mercury factory warranty, and it's completely emissions safe. The performance chip is fully compatible with all trims, including (but not limited to) Base, Colony Park, GS, GSL, LS, LSE, Limited Edition and Ultimate Edition models with 4.6L, 5.0L and 5.8L engines. We strived to create the most high quality product in every aspect, delivering you the most affordable product without sacrificing quality. All Mercury Grand Marquis performance chips feature a high-end aluminum enclosure with an extremely durable, high quality anodized finish. It's a thousand tiny details that add up to something big. All Mercury Grand Marquis performance chips are proudly backed by our unmatched 100% Money-Back Guarantee & Lifetime Warranty! A properly maintained vehicle is required for the performance chip to function as intended and advertised. Results may vary.