HKS 50004-AK001 Premium Spark Plug Socket 16mm Slim-Type with Magnet

The HKS 50004-AK001 Premium Tool Plug Socket is a precision-engineered 16mm spark plug socket developed in collaboration with renowned Japanese tool manufacturer TONE. Designed specifically for installing and removing spark plugs in vehicles with narrow plug holes — such as BMW and MINI models — this slim-type socket solves a common fitment challenge that standard sockets cannot address.

This socket is purpose-built for use with HKS M-XL and MR-XLZ spark plugs that feature a 12mm thread with an L=26.5 specification and a 10.5mm insulator. Its slim-wall construction allows it to fit into tight spark plug wells where conventional sockets simply won't reach.

Key Features:

• 16mm hex size — matches the nut opposite side of compatible HKS spark plugs
• Slim/thin-wall design — engineered to fit into narrow spark plug holes on BMW and MINI platforms
• Built-in magnet — securely retains the spark plug during installation and removal for added convenience
• 9.5mm insertion angle — precision geometry for proper engagement
• Co-developed with TONE — manufactured by one of Japan's most respected professional tool makers
• Compatible with vehicles using 14mm 13-corner style spark plug configurations

For enthusiasts and technicians working with HKS performance spark plugs on European vehicles, the 50004-AK001 is an essential tool that ensures proper installation without risk of damage to the plug or cylinder head.