If you are going to autocross running HD's would be a major mis-step IMHO. You'll want that car set up as aggressively as possible, and Sports will be the way to go.

I run HD's in all my street cars, but anything that's going to see race like conditions needs something More.

Jonathan

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Jonathan Hodgman
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Enthusiast Service, Restoration & Tuning.
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Autocross in a E420? That's kind of outside the design spec, isn't it?

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"It's not about how fast you can go, but how well you can go fast."

Bob in Richmond

'97 S320 (LWB), Ruby Red Metallic, 73k miles
'97 S420V, Smoke Silver Metallic, 155k miles