umm,, not sure,, i think that it has helped a little. i been driving alot more economocally lately.. i dint think there worth the full £54.99 they are brand new. i got mine from ebay for £30 which was brand new.. feel a little ripped of but not as bad as i wud felt if i had paid £50 +
im keeping me eye out now for one of the piperX filters to go onit cause they do make a bit of noise, and it aint a nice noise lol.
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im keeping me eye out now for one of the piperX filters to go onit cause they do make a bit of noise, and it aint a nice noise lol.