i have to get a new motor mount for my car..at reverse the car vibrates a little but when i drive on reverse it goes away...my mechanic said that the left motor mouont is weak....what yous think...i also got 6 and a half rockfor fosgate speakers for sale and 6 by 9 pioneers 4 sale..the pioneers i got were the last speakers made by pioneer n the best same for the fosgates....the pioneers r 5 way 480 watts super tweeters.....