2015 Cadillac Escalade Hennessey HPE550 Boasts 557 HP by CLittle | Apr 23, 2014 | News Hennessey offers a supercharger for the Escalade’s 6.2-liter EcoTec3 V-8 that bumps power up to 557 hp and 542 lb-ft.The HPE550 upgrade is also available for other GM vehicles …read more Share this:FacebookTwitterPinterest