First, always remember the main rule:
If it doesn't say your can do it, then you can't.(IIDSYCDITYC) or something like that!
On the other hand, "if it says you can, then you bloddy well can!" (Geo, '01)
Power windows stay on pass side, can be reomoved on drivers side if you go with a "NASCAR" style bar that projects INTO the opened door cavity. (Highly recommended) It doesn't need to look like a NEXTEL Cup car, just one bar meets the requirement, but do more.
You can gut the AC, but not the heater core nor the heating system components. In other words, if your car was available from the factory without AC, then whatever was standard must remain. The only legit exception to that rule is if you need to notch something for your cross car tube, you may.
Changing to a fuel cell usually results in an addition of weight as the brackets and supports will add more than you think. Many factory tanks are well placed, and quite light. Think carefully about this one. (But no mods are allowed to it if you decide to keep it) if the tank is a known safety issue, replace it, otherwise, buy an Isaac or HAns with the $. Better value.
Rotors, flywheel, etc must be stock.
Battery must be close to stock, and stay in the stock location, but that rule was just rewritten, double check the exact wording.
Your sunroof may come out and be replaced by a panel the same thickness as the roof, OR you can bolt your existing sunroof in.
Carbon hood? I will make you happy...save your money! Do you want to replace it after every off at big $$$$?? The rules fortunately disallow it. Your only option in the body panel weight savings area is if certain years of your car (that are on the same ITCS spec line) use lighter components, (like a hood) then you may use that assembly. But you must use the entire assembly, no picking and choosing and creating something that never existed.
Radiator is free, as long as it resides in the stock location and bolts to the stock mounting points. And no getting a narrow, but thick radiator, using brackets with big holes and getting ram/cold air into the compartment. They closed the old loophole on that one.
Get the GCR, it's all spelled out...
Lots of guys strip the shell of undercoating. It can be good for 30 to maybe 50 pounds. Not a fun job though.
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Jake Gulick
CarriageHouse Motorsports
ITA 57 RX-7
New England Region
[email protected]