I've been drafted into service as the powertrain guy on a GRM $2006 Challenge car. The car is a "locost" 7, homebuilt chassis type thing. I'm staying out of that end of the deal. The fun part is the j-bridge rotary that's going in it. I'm going to need to build a header for it and thought someone's cast off collected header may be a good jumping off point. If it's got a good flange and a good collector and fits the budget I'm interested.