TPO - AIS Removal Kit

[VNA]

I tapped em donkeys years ago.  Was fairly straightforward, just took my time.  Don’t use a cheapie tap, make sure it’s a pukka quality hardened item.  You don’t want a snapped tap in there.

Ivan does a kit with a good quality tap, though it’s maybe a wee bit pricey for what it is.
http://www.ivansperformanceproducts.com/R1Airkit.htm