13b 6port auxiliary inserts (NONE RX 8) this pin set is a

this pin set is a must-have for maintaining or restoring your 6 port engine

Elevate your rotary engine performance with the Intake Porting Template for the 13B-REW

Perfectly designed for 12A engines

Versatile Use: Compatible with 12A and 13B engines for multiple porting setups

13b 6port auxiliary inserts (NONE RX 8) this pin set is aSRRPS 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.