We thought you might be interested to read this news story about the delivery of the first IC Bus CE Series units with the Cummins ISB 6.7-liter engine.
Well, they didn't say anything about ratios, only that they sold 2k unit with Cummins. It would be interesting to know how many "in house" engines they sold.
Their pricing strategy has been interesting, in my area they have been quoting the Cummins engine at a lower price than the Maxxforce and DT. My guess is that IC is trying it make it seem like their engines are still a premium product over the Cummins but who knows. IC sells buses because they are CHEAP, we all know low bid rules the school bus industry for the most part.