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Comparing 2004 rules D.1.a.3, D.1.l and D.1.q, I'm pretty sure that external coating of the intake is allowed, but not so sure about polishing. Is there another applicable sentence somewhere? Many "coatings" first require a preparation of the surface that could be classified as polishing...

ITCS (GCR 17.1.4.D.1.r) allows addition of one "engine stayrod". An "engine stayrod" is not defined, but the glossary (GCR 22.1) defines a "stayrod" as "interconnecting opposite sides of a car." So, can the stayrod also be longitudinal (e.g., for transverse engined FWD cars)? Any min/max...

OK, we have to keep a heater core in the car. The heater core (when actually connected) functions as a radiator. We're permitted to change the size of a radiator. So, if the heater core in a given car is more than just present, but actually hooked up (thus functioning as a type of radiator)...

For OBD2 cars with 2 original O2 sensors, what can be done with the downstream sensor (originally after cat) and/or the wires after fitting a racing exhaust? If I do nothing, the check engine light comes on and the car feels much less responsive. That can't be right... can it?

My '96 2-door came to me without a gearbox (or an engine, for that matter). The GCR lists a 1.21 3rd gear for G/J3 in both IT and SS. My '99 G/J3 Bentley manual only seems to list one gearbox with a 1.28 3rd gear for US 2L cars. Based on the Rabbit GTI experience, I assume that this Bentley...

Now that this is allowed, what's required to actually do it at the track? I know some of the Hondas are already doing it. I'm building a VW, but understand that OBD2 works pretty much the same way across the makes. I have the laptop, so where do I get the diagnostic port cable, interface...

OK, I've seen several Honda guys reflashing their own OBD2 ECUs at the track, but all I see for VWs are reflash services where we have to mail in our OBD2 ECU and wait... Is there some reason that we can't reflash our own at the track? I thought OBD2 was supposed to work "the same" for all...

I gave away my '01 GCR and haven't received the '02 yet. Can anyone tell me whether a '95 GTI VR6 is classified in ITS? If so, how does the min weight compare to the Corrado? Thanks

Well, having JUST installed my first pro-built engine (last night, no less), I learned today (on excellent authority) that it will be outlawed on Dec 1st, apparently due to insufficient sales of "HT" equipped Sciroccos in the U.S. Next month's Fastrack TB01-12 will read: "ITB 1. Volkswagen...