Product Description For cutting threads in the cylinder head to install 380-346 compression release valve Tap size: M10 x 1.0 Use with 9mm (.354") pilot JIMS Thread Tap Tool at RevZilla Browse all RevZilla deals $59.95 In Stock at RevZilla Price verified 2d ago Buy Now at RevZilla Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand JIMS Size OS Condition New MPN 11691 JIMS