All engines are assured in superior Doing the job buy when supplied and have been examined prior to dispatch from Japan. The startup guarantee addresses the engine block, not any ancillary components like turbo, alternator, ECU, etcetera. There are many stroker kits accessible for RB Engines (some only accessible as https://nissanrb26engine93245.loginblogin.com/38074991/about-used-rb26-engine