The Performance Series Exhausts are assembled on a durable 6063-T6 aluminum alloy shell, with magnesium and silicon as the alloying elements. You can add a high temperature powder coat for a completely sick, custom look. Features a 2 1/8 inch unrestricted core, it also has a special hole pattern in the core that allows the exhaust system to increase power evenly throughout the RPM range. HMF is well known for their deep trademark sounds, the Performance Series is described as a deep, aggressive, angry tone. You can also customize your Exhaust to have it match your machine making it that much cooler! This kit is the Dual Full System and it picks up 6 more horse power. This kit will weigh substantially less than your stock exhaust.These HMF Exhausts will perform on the highest level, giving you that extra boost you needed. Upgrade your RZR RS1 with this HMF Performance Series Exhaust today! **Fuel Tuning is not required when installing an HMF Exhaust on this machine. However, other modifications to the machine may require the need for fuel tuning to ensure the machine runs properly, and there is no damage to the exhaust system. *Blackout Available* You can now add a specialized matte colored ceramic coating that is formulated to withstand extreme temperatures. Click HERE to see this product. This finish will increase impact strength while increasing resistance to abrasion, corrosion, and chemicals. This Blackout Coating is capable of withstanding up to 1200 degrees Fahrenheit!! It is formulated to withstand the extreme temperatures from an exhaust system, making your exhaust have less intense exposure to the elements. *HMF Gen 3 / 3.5 Optimizer* Add this HMF Optimizer that is a Fuel-Injected Controller that has been pre-programmed with the proper tuning specifications for your HMF Exhaust. This is a Plug and Play installation allowing you to tune your Exhaust to make your machine run top notch. No CPU or Dyno needed, and gives you Full Range Tuning. You must re-tune your machine when you're adding an exhaust system, so not tuning your machine will void the warranty of your exhaust so keep that in mind. *DynoJet Power Vision CX Tuner* Add this Power Vision CX Tuner with your Exhaust to allow you to completely fine tune and customize your exhaust and machine performance. These are plug and play with the HMF Exhuasts and is the latest flash tuning technology, real time data monitoring, and other industry exclusive features. - Our HMF Exhausts generally ship out within 1-2 business days! (Custom Colors may take 4-5 Days to ship) - Fits: Polaris RZR RS1 : 2018+ - Will give your machine more power - Made in the USA! - Add custom colors - Get that Deep, aggressive tone! - Dual Full System