i have a baja x and i was wonder how much they are and how many db's are they

 

Depending on who you ask you'll get different answers whether they're good or not...my opinion is they're okay if your gonna stay with very basic mods and aren't looking for topend. No one in here has run one long enough to give accurate details on how efficient the "non-repackable" design is...whether they'll last beyond a couple of years or not is still unknown. The cost is right at $300 unless you find one on ebay...there are two designs: quiet and race (both can be had with the optional 'non-approved' spark arrestor screen which is a weak design). You'd be better off making a different choice...honestly. It seems like the quiet MBRP is around 96dbs.