Believe me, if its illegal they will find it regaurdless... They know all the signs of engine upgrades... And an intercooler, piping, and a BOV arent hard to find... Cops are smarter than most ppl give them credit for... But my point was, why downgrade a D series (and the b7 of all D series), when u can just boost the B? All youd need is a B series manifold... I mean you already have the B in there... And screw 14s, hitting 13s would be a possibility with the right tuning and driving... Course you still have legality issues being in California... But if Im not mistaken, I think boosting is legal to some degreee atleast, so long as u get it ref'd and keep it within a certain range...