I ended up having to get my car out of storage a little sooner than i wanted to cuz my winter beater broke down, ended up getting a set of BKR6E IX plugs for it $14.99 a pair from partsource that was the closest place do my house didnt wanna drive too far without changing the oil didnt get just the regular copper ones they didnt have them in stock so far here is what i have noticed:
1. right away i noticed that the car idiles a whole lot smoother noticed it as soon as i started the car.
2. there was a definate increase in power in the lower rpm levels, all i have on my car at the moment is an m3 exhaust and a intake and i must say i noticed a much bigger difference just putting in these plugs and removing my bosch ones( which were in really good shape suprisingly) than i did installing the intake and exhaust.
as for gas mileage havent really noticed much of a difference yet but this might be due to the fact that i just got the car on the road and have been having a little too much fun with the gas pedal.
so on the bright side car runs better and the not so bright side i cracked the fuk out of my m3 front bumper pulling in to park
forgot how low the car was a hit the curb, hopefully i can get it fixed without it costing me too much its a very clean crack in the middle of the bumper paint didnt even chip almost feel like just gluing it if i can find the right thing to use