My rm250 has a pro circuit on it i paid 189 for it and it after one week of riding the "stainless steel" finish is peeling back.Now my 1988 cr250 has the fmf gold series pipe that thing been threw everything for about 2 years still looks brand new has a great shine to it too.Power wise i've felt a big difference in fmf.But pro circuit does have a better tighter sound to it but i pick power over sound.Some other are different.Hope this helps.
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