GlowShift1/8-27 NPT Drill & Tap Kit - 1/8" Carbon Steel Tap & R High Speed Steel Drill Bit for EGT Probe Installation to Exhaust Manifold

I purchased this along with an Auto Meter 8444 EGT gauge for my 2006 F350 6.0 Diesel. After doing A LOT of research, I used no grease and no pilot bit. I did, however, use a spring punch to establish my start point and a large N52 magnet on the drill bit shaft. I drilled very slow with minimal pressure. I paused a few times to dump the attached shaving and the bit worked flawlessly. The tap, I also used the magnet on its shaft. Afterwards I used my shop vacuum at the hole then some bent Q-tips with a small dap of grease. That worked great. Then I used copper based high temperature anti-seize on the threads before tightening the EGT thread plug. This GlowShift drill and tap set was a great product and after taking careful use of it, I guarantee I could reuse it more than once. I'm very happy with the product and I highly suggest it for EGT tapping.

cut threads perfectly

Perfect for the egt install on my truck

Used this to tap cast iron exhaust manifold. Was wary about it breaking after dealing a few bad reviews, but it did just fine for me and cut threads well. I had previously never cut threads before but it worked well for a first time user! I’d say don’t crank too hard and you’ll be good to go. Just tap some, back it out, and tap some more. Maybe watch a YouTube tutorial first though.

Put gauges in and this tap and drill worked hreat