TruHart StreetPlus Coilovers w/ Front Air Cups + Gold Control System 2013-2015-Acura-ILX A stepped drill bit works

A stepped drill bit works well for doing this

this is a great option

The fast ramp rate of aftermarket cams is the main cause of this

What does the radiator cap do

it expands creating pressure inside of the system

TruHart StreetPlus Coilovers w/ Front Air Cups + Gold Control System 2013-2015-Acura-ILX A stepped drill bit worksCombining nearly two decades in the coilover and a decade in air suspension industries VERA brings you a solution that offers the best of both worlds. Our air cup kit provides on demand height adjustment while maintaining the performance and reliability that users expect from coilovers. Manufactured from CNCed billet aluminum with a double sealed piston which with the push of a button can raise the vehicle up to 2" in seconds. This height increase