13b 6port auxiliary inserts (NONE RX 8) 2 Oil Pedestal o-rings

2 Oil Pedestal o-rings

this graphite gasket (N318-13-491) ensures a tight seal and enhances exhaust performance

Precise Porting: Achieves exact exhaust porting for enhanced performance

Reduces heat transfer for improved carburetor performance

Perfect Fit: Tailored for 1992-1995 Mazda RX-7 FD with 13B engine

13b 6port auxiliary inserts (NONE RX 8) 2 Oil Pedestal o-ringsSRRPS 13b 5 6 auxiliary port inserts are made to "PINEAPPLE RACING" standards. They are machined from 6061 aluminum and designed to fit into factory auxiliary tubes as to retain factory use. These inserts will DRAMATICALLY INCREASE airflow. Which meres better gas mileage and increased power. They are sold as pairs.