I've been driving my 1998 BMW 328is for a couple years in STX, but was considering going back to D STOCK class. I know I need to return to the stock airbox and 15 (or 16) inch wheels. My suspension has only been modified mildly with the addition of H&R Race springs on Bilstien Sport shocks. They lower the car about an 1" or so. I'm also considering Swaybarbarians for the front and rear. Can I run an LSD if it has the same ratio as stock or was a stock option on the car?
Now on to tires. If I understand correctly, I can run any DOT R-Compound on the stock size wheels. Is that right?
Any other advise for modifications that can be done and still remain in stock class?