I think the new CTS motor is a DOHC V6 as well as the GMC Acadia, Buick Enclave, and Saturn Outlook SUVs.
The caddy version is direct injection and makes about 305 hp
the other regular injected models are about 275 hp
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if it's cheap & reliable, it ain't fast, if it's fast & cheap, it ain't reliable, if it's fast & reliable, it ain't cheap