Step Stud, 8mm Thread To 10mm Thread, 1-1/2 Long, Each

OVERVIEW

Dealing with a stripped exhaust stud in an air-cooled Volkswagen cylinder head is a rite of passage for many enthusiasts, but it doesn''t have to mean the end of your cylinder head''s lifespan. Our Step Stud is the professional-grade solution designed specifically to salvage heads where the original 8mm threads have failed or pulled out due to heat cycles, over-torquing, or heavy corrosion. This heavy-duty repair stud features a unique "step" design, utilizing a larger 10mm x 1.5 thread on the side that anchors into the cylinder head, while maintaining the standard 8mm x 1.25 thread on the outboard side. This allows you to repair the damaged casting with a much stronger 10mm footprint while still being able to use your original 8mm exhaust nuts and heat exchanger flanges without any modifications to your exhaust system or cooling tin.

Precision-engineered for the rigorous environment of a VW engine bay, these studs are manufactured from high-strength steel to ensure they can handle the constant expansion and contraction of the aluminum head. At 1-1/2 inches in total length, they provide ample thread engagement in the head to prevent future pull-outs while offering enough stick-out to secure even thick aftermarket high-performance exhaust flanges. Whether you are rebuilding a stock 1600cc Beetle engine or maintaining a high-output off-road sand rail, having a few of these step studs in your toolbox is essential for quick, reliable repairs that keep your VW on the road or trail instead of on the workbench. It is a cost-effective alternative to expensive machine shop visits or the total replacement of a dual-port cylinder head.

FITMENT

• Volkswagen Type 1: Beetle, Bug, and Super Beetle (All Years)
• Volkswagen Type 2: Bus, Transporter, Kombi, and Microbus (1950-1971 with Type 1 Engines)
• Volkswagen Type 3: Fastback, Squareback, and Notchback (All Years)
• Volkswagen Karmann Ghia: Coupe and Convertible (All Years)
• Volkswagen Type 181: The Thing (All Years)
• Custom Applications: Dune Buggies, Sand Rails, and Trikes using VW Air-Cooled Cylinder Heads

SPECS

• Part Number: N144832
• Total Length: 1-1/2 Inches (approx. 38mm)
• Repair Side Thread (Anchor): 10mm x 1.5 Pitch
• Exhaust Side Thread (Outboard): 8mm x 1.25 Pitch
• Material: High-Grade Carbon Steel
• Finish: Zinc Plated for Corrosion Resistance
• Quantity: Sold Individually (Each)
• Application: Oversize repair for stripped 8mm exhaust ports

PRO TIPS

1. Precision Drilling and Tapping

When preparing the cylinder head for this step stud, precision is critical to ensure the exhaust flange aligns correctly later. You will need to drill out the damaged 8mm hole using an 8.5mm (or 21/64 inch) drill bit. It is highly recommended to use a drill guide or a very steady hand to keep the hole perfectly perpendicular to the exhaust port face. Once drilled, use a 10mm x 1.5 tap to cut the new threads. Always use a high-quality cutting lubricant and back the tap out every half-turn to clear aluminum chips, preventing the new threads from tearing or galling inside the head casting.

2. Permanent Anchoring Techniques

To ensure the stud stays in the head