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Here's what a pair of factory entered R391's by NPTI for the 1999 ALMS season may have looked like.
I decided the 1999 ALMS season would be more interesting with customer entered BMW V12 LMR's.
What Penske backed Mercedes CLR's could've looked like for the 1999 ALMS season.
Dan Gurney's AAR abandon their CART campaign and return to endurance racing for 1999.