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. We are here to assure you that we will always immediately address any concerns you may have.This item is in the category "eBay Motors\Parts & Accessories\Motorcycle & Scooter Parts & Accessories\Exhaust & Emission Systems\Exhaust System Kits". The seller is "mxsouth" and is located in this country: US. This item can be shipped worldwide.