Vibrant Intercooler Core, 25"W x 11.8"H x 3.5" Thick - 12832 AN Vise Jaws Subaru Urethane Exhaust Hangers -

Subaru Urethane Exhaust Hangers - 15mm (sold individually) Durable Urethane Construction

A stepped drill bit works well for doing this

or you want to upgrade to a stiffer bushing (or vice-versa) these are exactly what you need

C16 fuel has an established performance standard that still exists today

This 6" velocity stack is designed to lower inlet restrictions and allow more air into your engine

Vibrant Intercooler Core, 25"W x 11.8"H x 3.5" Thick - 12832 AN Vise Jaws Subaru Urethane Exhaust Hangers -Vibrant Performance Horizontal Flow Air to Air Intercooler Cores feature Bar and Plate construction and a unique louvered fin design on the ambient path that maximizes the core's available surface area, and an offset fin design on the charge path allows for minimal pressure loss.