Description
The Polaris RZR XP-4 1000 HMF Dual Full System is available in the Performance Series. The Dual Full System picks up 4HP at high RPM and 2lb TQ at the wheels. The exhaust also picked up more power when we installed the HMF Quiet Cores. Additionally, the aluminum shells and stainless head pipe weigh substantially less than the stock exhaust.
An 18MM to 12MM Oxygen sensor bung adapter is included with this exhaust to adapt your OEM oxygen sensor to your new HMF exhaust. While using your machine with the factory fuel tuning is not ideal for optimum engine performance, it is not harmful to your engine. HMF absolutely recommends using an aftermarket fuel tuning device such as the Dobeck AFR Gen 4 once it is available. This system will use a wideband oxygen sensor that has 18MM threads.
