sorry what is MBRP? I really don't know and can't help if I don't. I haven't seen antyhign but clutch kits for fan sleds and that was just for Cats.
It's a company that manufactures and sells performance parts mainly exhausts for sleds and cars.
I've got one of their silencers on my sled. I'm not sure if it really indreases HP but it's lighter and sounds tougher than stock.
they sell a viper one they say HP gains "not available" aka Vipers don't gain horsepower off of a silencers only lose weight. I wouldn't be surprised if on a Viper you actually lose torque with a new silencer do to the less backpressure.
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