Stage 3 full porting for a GM TPI upper plenum which includes opening up throttle body entry for your choice of 52mm 58mm or single large mono entry. Removing EGR walls behind throttle body additional blending and for 85-88 plenums reworking IAC the hump to a smaller shape for additional flow 89-92 don't have this hump. Opening up all eight runner entries matching them for any large tube, cast runners that your are using. Reworking and radiusing all runner entry angles as well as removing ALL walls/protrusions cast near runner entries
PRICE FOR FULL PLENUM PORT $250 INCLUDES 80 GRIT FINISH AND RETURN SHIPPING
TURN AROUND TIME 3-4 BUSINESS DAYS
CAN USE OWN PLENUM IF YOU DON'T HAVE OR WANT TO SHIP OUT FOR ADDITIONAL $100
RADICAL PLENUM PORT WORK AVAILABLE TO YOUR HEART DESIRES REMOVING BOLT BOSSES LARGER SIAMESED RUNNER ENTRIES CUSTOM SET UPS CALL OR EMAIL TO DISCUSS