Stock LS1 gap .050. The fine electrode tip is engineered for greater ignitability. And it's in the design of the iridium tip that makes Iridium IX a better spark plug. The electrode is not too thin and not too thick. It's just the right size to reduce the voltage required for spark and to maximize the overall longer life qualities of iridium.
* Please note FREE Shipping refers to shipping within the contiguous contential US. All other locations extra. If the item is in stock this should ship same day or the next business day. If the part happens to be out of stock we will notify customer.
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