Originally Posted by vqpower

Thanks for the responses. I have no problems with paying the little extra for the SPLs, I think it's reasonably priced for a high quality part. My only concern is with significantly reducing the comfort of the car. Exactly how much of a noise, vibration and harshness increase can one expect from going from stock to SPLs? I really just don't want to make the car unpleasant to ride in.