Mini PowerCore 4™ Spark Arrested Slip-On Muffler (040084) by FMF Racing®. The Mini Powercore 4 is the best bang for your buck performance bolt on for your mini. Offered as a standard Mini Powercore 4, Closed Course Big Bore System or as a Spark Arrestor Version, the Mini Powercore 4 features a Hi-Flo stainless steel core and formed end caps, an aircraft grade aluminum canister and a durable stainless steel header. Its pounds lighter than stock and you will swear the motor has been bored and stroked with the first twist of the throttle. Hi-Flo Core and End Cap. Pounds lighter than stock. Race-inspired, price-point muffler made for maximum power output. Aircraft-quality extruded aluminum canister with stainless steel components. Spark arrestor included on S/A models, see footnotes.
Notes
Remember to check your local or state laws regarding vehicle noise restrictions.
The latest version of the Powercore 4 design incorporates a hi-flow core which has more surface area to absorb more sound while flowing more exhaust
Constructed with an extruded aluminum canister, a stainless steel mid-pipe that is MIG/TIG welded and has space age internal packing
Lighter, stronger and more powerful than stock exhausts
Powercore 4 S/A has a U.S. Forestry approved maintenance free, stainless steel spark arrestor screen
Has a U.S. Forestry approved maintenance free, stainless steel spark arrestor screen
Designed for your exhaust system needs
Will deliver unparalleled performance
Exquisite workmanship and great longevity
Over the decades, FMF Racing® has seen an amazing transformation in the world of motorcycles and ATVs. The progression of the technology is one of the challenges that keeps them going. FMF was there in the days when the singleshock and watercooled engines were huge innovations and FMF is glad to be here now for the aluminum chassis and electronic fuel injection. The goal will never change - take the most advanced machinery to its limit by building the world's best performing exhausts. And its a fact, FMF build every exhaust by hand from start to finish right here in the U.S.
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I’m very pleased with the results. Installed this muffler without any problems. It fits exactly as described and provides a slight increase in top-end speed. And yes, it sounds really nice. Loud but not annoying. Just what I wanted!
Posted by James (Fort Worth, TX) / June 04, 20202018 Yamaha YFZ450R
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