Airstrip Attack: C6 Z06 Bolt ons (570HP) vs C6 ZR1 Stock (638HP) by shift-s3ctor | Apr 8, 2013 | Videos | 0 comments C6 Z06: Bolt ons and heads. C6 ZR1: Stock. Related Submit a Comment Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Notify me of follow-up comments by email. Notify me of new posts by email.