Sioux Style Valve Seat Grinding Kit – 12 Grinding Wheels + 6 Pilots + Stone Holder

Upgrade your engine reconditioning setup with this BLUEFOX TOOLS Sioux Valve Seat Grinding Wheels 12 Pcs Set with 6 Pcs Pilots and 1× Stone Holder — a complete, high-quality solution for precision valve seat grinding. Designed for professional machinists, automotive rebuilders, and workshop technicians, this set delivers accuracy, durability, and compatibility with Sioux-style valve seat grinders.

This premium kit includes a 12-piece vitrified bond 80-grit pink aluminium oxide grinding stone set, covering sizes from 25mm (1") to 51mm (2½"), ideal for a wide range of valve seat reconditioning jobs. Each stone is made from high-performance abrasive material to ensure excellent cutting action, long service life, and consistent grinding results on all types of engine cylinder heads.

The set also includes a 6-piece Sioux straight pilot set, featuring a top diameter of .385" and stem sizes 4.5mm, 5mm, 5.5mm, 6mm, 7mm & 8mm — giving you precise alignment for automotive, diesel, and industrial engine valve seats.

Completing the kit is a heavy-duty Sioux-style stone holder (11/16" thread) with a drive ball, engineered for smooth operation, stable stone mounting, and long-term reliability. This holder ensures accurate engagement with the grinder and secure stone rotation with minimal vibration.

Perfect for workshops performing valve seat cutting, valve seat grinding, cylinder head reconditioning, automotive engine rebuilds, and precision engineering, this all-in-one set ensures you have every essential tool for professional results.

  Key Features

• Complete Sioux Valve Seat Grinder Kit with grinding stones, pilots & stone holder

• 12 Pcs vitrified bond 80-grit aluminium oxide pink grinding wheels for fast, accurate cutting

• Grinding stone size range: 1" to 2½" (25mm to 51mm) – ideal for multiple engine types

• Stone sizes included: 2½", 2⅜", 2¼", 2", 1⅞", 1¾", 1⅝", 1½", 1⅜", 1¼", 1⅛", 1"

• Stone thread: 11/16" – compatible with Sioux-style valve seat grinder systems

• Includes 6 pcs Sioux straight pilots with .385" top for accurate valve seat centring

• Pilot stem sizes: 4.5mm, 5mm, 5.5mm, 6mm, 7mm, 8mm

• Heavy-duty Sioux style stone holder (11/16" thread) with drive ball for stable operation

• Perfect for engine rebuilding, cylinder head repair, valve seat resurfacing, automotive workshops

• High-precision components ensure smooth grinding, accurate alignment, and long durability