HMF TWIN LOOP EXHAUST

— Testing a very quiet exhaust —

For the Polaris RZR XP 1000 systems are available as a single slip-on system in the Titan series, a dual full system in the Titan and Performance series, or a Twin Loop System in the Titan-QS Series. HMF saw a 2–4-decibel increase with Quiet Cores installed on the slip-on and dual full system and 6–8 decibels without. The Twin Loop system is 8-10 decibels quieter than stock without losing any power.

The Performance series dual full system has 9–11 horsepower and 5–7 pound-feet of torque gain at the wheels. The aluminum shells and stainless head pipe weigh substantially less than stock.

The Titan series slip-on picks up 8–10 horsepower with 5–6 pound-feet of torque, while the dual full system picks up 9–11 horsepower and 5–7 pound-feet of torque at the wheels. The Titan-QS series in the slip-on and dual full systems have an exhaust tone that’s slightly quieter than the stock muffler.

The Twin Loop slip-on system connects two Titan-QS silencers in series, creating more capacity to handle sound pulses. The looped system traps the exhaust sounds, absorbs them and allows the exhaust to run quieter than the Polaris RZR XP 1000 stock muffler by 8–10 decibels without losing any power.

The stock muffler on the RZR is not bad, but over time they have been known to crack, especially if they go in and out of water while hot. A replacement muffler is around $600, so you can get the HMF product for only a couple of hundred dollars more.

WHAT IS IT:

A twin muffler system that replaces the Polaris muffler in the event of a failure or if you are searching for something that looks better or is a little quieter than stock. An OEM Polaris muffler is over $600 retail with spark arrestor. The Twin Loop is only available for the Polaris RZR non-turbo models.

FEATURES:

The system directs all of the exhaust flow through both mufflers and then out to the right side of the car. Those are Titan-QS series mufflers that HMF claims each reduce sound levels 3–4 decibels without any power loss. On the other end of the spectrum, HMF does sell an XL series that is extra loud and more powerful if that’s more your cup of tea.

CONSTRUCTION:

The Twin Loop product is made by using two stainless steel Q-series mufflers installed inline. Our mufflers were upgraded ($100) with the Blackout ceramic coating.

INSTALLATION:

HMF supplied detailed directions with photos, so the install only took minutes. It took longer to let our car cool than it did to do the pipe swap. When installing any aftermarket part, we always take a two-mile run to make sure everything is working properly before installing a new component. The only special tool we had to dig up was a long 1/4-drive extension and 1/2-inch socket to keep us from scratching the beautiful ceramic-coated muffler.

THE VERDICT:

If you want to quiet down any RZR, there are only a few choices. Not only is HMF an expert in building long-lasting, powerful exhaust systems, it builds products that work. The Twin Loop works as advertised. It looks very cool, and it not only quiets the RZR’s output going down the trail, you hear much less noise in the driver’s compartment as well. As for power loss, there was none. Our RZR was just as fun as before. The only difference was that we could hear things that we normally couldn’t, such as a faint belt squeal or drivetrain noise. The product was fairly simple to install, required no fuel tuning, and we were back on the trail riding quieter in less than an hour.

CONTACT: www.hmfracing.com

RATING: ★★★★★

PRICE: Starting at $949.95

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