Exhaust system for 15′ XP 4

What exhaust is everyone running? I heard Sparks and Alba’s exhaust were the only ones making noticeable power. Is this true? I have a friend that put an SLP on his two seater and noticed a slight difference. I want something that has good power gains and is not abnoxiously loud. Oh and needs to be reasonable in price. Reviews and dyno charts are always welcome. I already had clutching done if you were recommending going that route. I just need a little more power! [emoji1]

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