In 1974, a fresh approach was utilized to harden the rotor housing. The Sheet-metal Insert Course of action (SIP) utilised a sheet of steel very like a standard piston engine cylinder liner which has a chrome plated area. I procured this engine based on the a few 12 months components https://mazda-rx-7-engine56420.aboutyoublog.com/31666256/not-known-factual-statements-about-13b-twin-turbo-engine-for-sale