



Upgrade your valve seat grinding and cylinder head machining setup with this professional 14-piece Sioux Valve Seat Grinder Pilot Set. 🔧🏭 Designed for compatible Sioux valve seat grinding equipment, these precision straight pilots are supplied in a wide range of metric and imperial stem sizes for versatile engine rebuilding and valve seat machining applications.
Manufactured with hardened construction, these valve seat grinder pilots are designed to provide reliable alignment and support during valve seat grinding, cylinder head reconditioning and engine valve work. ⚙️🔩
The comprehensive set includes 14 different pilot sizes, covering 4mm to 12mm metric sizes, plus 5/16" and 11/32" imperial sizes, making it a useful addition to professional engine machine shops, automotive workshops and cylinder head rebuilding applications.
| No. | Stem Size |
|---|---|
| 1️⃣ | 4mm |
| 2️⃣ | 4.5mm |
| 3️⃣ | 5mm |
| 4️⃣ | 5.5mm |
| 5️⃣ | 6mm |
| 6️⃣ | 6.5mm |
| 7️⃣ | 7mm |
| 8️⃣ | 8mm |
| 9️⃣ | 9mm |
| 🔟 | 10mm |
| 1️⃣1️⃣ | 11mm |
| 1️⃣2️⃣ | 12mm |
| 🔩 | 5/16" |
| 🔩 | 11/32" |
Top Diameter: 0.385"
These Sioux valve seat grinder pilots are designed to locate through the valve guide and provide a stable reference during valve seat grinding operations. The hardened pilots help maintain consistent positioning and are suitable for cylinder head reconditioning, valve seat repair and engine rebuilding when matched with compatible equipment.
🚗 Automotive Engine Rebuilding
🔧 Valve Seat Grinding
⚙️ Cylinder Head Machining
🛠️ Valve Guide Work
🏭 Engine Machine Shops
🔩 Valve Seat Reconditioning
⚙️ Engine Repair & Restoration
🔧 Automotive Workshop Applications
🏎️ Performance Engine Building
🛠️ Professional Machining
✅ 14 × Hardened Straight Valve Seat Grinder Pilots
📏 Sizes from 4mm to 12mm + 5/16" & 11/32"
🔧 Designed for compatible Sioux valve seat grinder systems
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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Nam tempus turpis at metus scelerisque placerat nulla deumantos solicitud felis. Pellentesque diam dolor, elementum etos lobortis des mollis ut risus. Sedcus faucibus an sullamcorper mattis drostique des commodo pharetras loremos.
Nam tempus turpis at metus scelerisque placerat nulla deumantos solicitud felis. Pellentesque diam dolor, elementum etos lobortis des mollis ut risus. Sedcus faucibus an sullamcorper mattis drostique des commodo pharetras loremos.
Nam tempus turpis at metus scelerisque placerat nulla deumantos solicitud felis. Pellentesque diam dolor, elementum etos lobortis des mollis ut risus. Sedcus faucibus an sullamcorper mattis drostique des commodo pharetras loremos.

