So I was told that update/backdate in stock class only applies if you change the whole component rather than parts. IOW, if I wanted to just put the intake from one car into another, I would have to put the whole engine instead to remain legal in stock is this correct?
Does the update/backdate for s197s include everything from 2005 to present? Or is the 2011 not included? If it is included, what can you do the rearend to make it remain legal in stock? Can you put the 3.55's from a GT500 in the rearend or would that kick you out of stock. I am not particularly sure how this rule applies to stock.
You really should read the rules for stock class. It's a very short read. There is no update/backdate in stock class. It does exist in Street Prepared. Stock class in a nutshell:
- Stock size wheels
- Dot R compound tires (any size you can fit on above wheel)
- Exhaust past the stock catalytic converter is free
- Shocks and struts are free (can't add coilovers if car didn't have them from the factory)
- Any front sway bar.
- Stock rear bar only.
- Stock seats
- Stock brakes (any pad)
- Stock air intake (any filter)
That's pretty much it. If it doesn't say you can change something, you can't. That includes rear gears. You can't change them. If you want to run the gears, springs, etc... from a different trim pkg. of the same year as your current car, you have to change EVERYTHING on the car to turn it into that model.
All the examples in your post are illegal for stock class.
The rules for Street Prepared are obviously much longer and more complex, and include update/backdate with cars on the same classification line.
Hell, I've been autcrossing a Mustang for 7 years now, and I "think" I understand E Street Prepared.
I do know that my car even with most of the ESP legal modifications is woefully outclassed thanks to the S197.