GlowShift 1/8-27 NPT Drill & Tap Kit for EGT Probe Installation — Cobalt Drill & High-Carbon Tap

GlowShift 1/8-27 NPT Drill & Tap Kit is a single-kit solution designed to drill and tap precise 1/8-27 NPT holes for installing EGT probes or boost sensors into exhaust or intake manifolds.

If you plan to fit a GlowShift EGT probe or boost sensor directly into a manifold, this kit supplies the correct-size high-speed drill and matching high-carbon tap to create a reliable 1/8-27 NPT threaded port. The drill bit has a cobalt finish and a 118° point for cleaner starts and longer life, while the tap cuts the tapered NPT threads required for sealed instrument fittings. This accessory is built to make sensor installation neater, faster, and more consistent than improvising with mismatched tools or relying on expensive machining services.

How does the kit make installing an EGT probe or boost sensor easier?

The kit is tailored to the exact thread standard used by GlowShift sensors, removing the guesswork about drill size and thread pitch. Using the correct drill and tap reduces the risk of cross-threading and helps ensure a snug, leak-minimizing fit for your probe or sensor.

• Includes a size R high-speed steel drill with cobalt finish for durability.
• Tap cuts 1/8-27 NPT tapered threads compatible with GlowShift fittings.
• Saves time compared with sourcing separate tools or visiting a machine shop.

What should I expect when drilling and tapping a manifold myself?

Drilling and tapping metal requires steady speed, proper clamping, and appropriate lubrication to prevent tool breakage and to produce clean threads. Work on a cooled manifold in a well-lit area and use a guide or pilot mark to keep the drill centered; slow, controlled tapping with cutting oil will produce the best seat for the sensor.

• Use a center punch to mark the drill location before drilling.
• Clamp or stabilize the manifold to avoid movement or vibration.
• Apply cutting fluid and clear chips frequently while tapping.

Will this tap work with other brands or fittings?

The 1/8-27 NPT thread standard is commonly used across many sensor and compression fitting manufacturers, so the tap is widely compatible with devices that specify 1/8-27 NPT threads. Confirm the thread spec of your sensor or fitting before using the kit to ensure compatibility and avoid thread mismatch.

• Compatible with GlowShift EGT probes, boost sensors, and standard 1/8-27 NPT fittings.
• Not suitable for unified or metric thread standards (verify product specs first).
• Works well for most common automotive manifolds and light fabrication tasks.

How durable and supported is this tool kit?

The drill bit’s cobalt finish and 118° point are selected to extend life and improve drilling accuracy in exhaust or intake materials. GlowShift backs this accessory with established post-sale support and warranty terms to help with product issues or installation questions.

• High-speed steel drill with cobalt finish for improved wear resistance.
• High-carbon tap that produces the required tapered NPT threads.
• GlowShift offers a one-year limited warranty, free lifetime technical support, and 30-day returns.

Who is this for: This kit is made for DIY tuners, performance shops, and vehicle owners who want a straightforward, cost-effective way to add GlowShift EGT probes or boost sensors directly into manifolds. It suits anyone comfortable with basic metalworking and hand tools who wants accurate 1/8-27 NPT threads without outsourcing the job to a machine shop.