{"product_id":"spark-plug-index-shims-14mm-small-o-d","title":"Allstar Performance Spark Plug Index Shims 14mm Small O.D. (Set of 24) ALL96506","description":"\u003cp\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/Allstar%20Performance\"\u003e Allstar Performance \u003c\/a\u003e Spark Plug Index Shims are designed for fine-tuning spark plug placement in engines with 14mm flat seat spark plugs. These stackable shims allow for indexing at 30-degree intervals, offering adjustability up to 360 degrees. This enables precise positioning of the ground strap within the cylinder head, potentially improving power output and ensuring proper clearance between the spark plug and piston. The set includes 24 shims, divided into 12 silver 60-degree shims and 12 black 90-degree shims, along with instructions and a dial chart for optimal use.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/allstarperformance.com\/content\/1378.pdf\" target=\"_blank\"\u003e\u003cspan\u003eAllstar Spec Sheet\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Allstar Performance","offers":[{"title":"Default Title","offer_id":47363120562489,"sku":"DNLF_ALL96506","price":21.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/0903\/3273\/products\/ALL96506.jpg?v=1698281801","url":"https:\/\/tuning4.com\/products\/spark-plug-index-shims-14mm-small-o-d","provider":"Tuning4 Auto Parts","version":"1.0","type":"link"}