It seemed like BITD had that change of rules only for 2011. During 2011 we bought our Ecotec thinking it was legal. Some say a miss print, who knows. We made many phone calls and typed lots of emails back and forth to BITD asking if the any 4 cyl. Motor would b ok, and they said yes. That's obviously not the case anymore. We have now designed our car around the Eco.I agree 100%. No limit on Motor size. It's 5 unlimited leave the motors unlimited. Im not sure when BITD changed their motor rules for class 5 but last year it was ANY size four cylinder air or water cooled ANY make. Did not have to be VW. I thought that rule would bring some cars to the class but apparently it didn't.
I like the idea of any four cylinder unlimited mods!
If it has four cylinders bring it!