WHAT DOES RX7 13B MOTOR FOR SALE MEAN?

Every single Pettit Built Renesis is blueprinted and street ported with our proprietary mods which offer included cooling for the exhaust ports reducing side housing floor deformation at outer port edges, along with the space all over top spark plugs about the rotor housings.My very first time obtaining a made use of JDM Mazda RX-7 FD 13B-REW engin