I second that, Riprock is a fine example of what vehicle preparation has done for them, they are world champs in extreme 2.

 

The "vehicle preparation" on a extreme car is "box preparation", because the whole thing is a box. If they change small things on the box their score can fall 10dB without messing with the car structure (doors, windows).

I don't have an extreme car, but I would tell you, an extreme car made with 1 layer of 3/4" MDF and the correct design (box) would be louder than a fully reinforced car (4" glass windows, etc) and the wrong design, much louder, btw.

 

Good call, my only point is that vehicle preparation is equally important and from what I have experienced with the build on my own vehicle and doing tests after every modification to see if the SPL improved or not ,was that the vehicle prep. did improve my SPL when I worked on vehicle prep work on my own vehicle.

 

i say its box till u can't get anymore outa it then prep

 

I would think that prep work inside the car (e.x. sound deadening) could change the car's frequency? Therefore you would halfto change the tunning of the box? So overall i would say box is more important than prep...