This MBRP exhaust system is designed for 2018 - 2021 Kia Stinger GT, GT1, and GT2 models. It's perfect for car enthusiasts who want to boost their vehicle's performance on a budget. Whether you're cruising on the highway or taking your car to the track, this exhaust system will give you a great sound and improved power. The tubing is 2.5 inches in diameter, and it's made of heavy - gauge Aluminized Steel, which is great for dry climates where there's not much rain or snow.