This is MAX level full porting on a pair of GM TPI runners to 1.7 inch diameter inlet flange interface and 39mm inner tube diameter, all existing dents and damage will also be removed with this process. This service is unmatched and unavailable elsewhere the process goes beyond the traditional dent removal service and is geared toward a performance oriented service. This is the best and only option if you want to retain the stock look of the original TPI runners while gaining power. This port job will outflow most all the aftermarket cast runners as a 39mm diameter bearing passes through each runner with ease, with most aftermarket cast runners the cast isn't consistent throughout they also have large blockages for the mounting bolts cast into them that reduce cross sectional area substantially

Ported Stock runners are 290cc and flow 280+cfm

PRICE FOR FULL RUNNER PORT $449 INCLUDES 80 GRIT FINISH

TURN AROUND TIME 5-6 BUSINESS DAYS

CAN USE OWN RUNNERS IF YOU DON'T HAVE OR WANT TO SHIP OUT

CAN REMOVE DAMAGED FROM AFTERMARKET AS&M RUNNERS AS WELL AS EXPAND THEM EVEN LARGER CALL OR EMAIL FOR MORE INFO

Professional porting and dent removal service for GM TPI runners that yields up to 15 horsepower

"IF HIGHFLOW DIDN'T PORT IT THEN IT WASN'T PORTED" ASK THE OTHERS IF A 39MM BEARING FLYS THROUGH THERE RUNNER