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At the dealer or somewhere else? Because that's not bad for a dealer actually lol. Luckily for me, I didn't have them done by the time my car went in for the revised pistons for the Carbon Build Up, so I just had to buy the spark plugs and labor was free since they were working on the motor anyways.
I wouldn't say they're VERY easy. 250's have to remove the intake manifold (I just half-removed it) and reach behind to reach one of the plugs. Certainly its doable. But it took me a couple hours to do mine.
yea i would say do it yourself...its not easy...well 2 of them are pretty hard and you have to remove intake...grab some beers and a good friend and get to work.