Description OEM LF4 pistons weigh 434 grams and the pins weigh 147 grams, for a total weight of 581 grams. Our custom manufactured Diamond Racing forged and coated pistons weigh 393 grams and the pins weigh 139 grams, for a total weight of 532 grams, which is an 8.4% weight reduction. Manufactured by Diamond Racing in the U.S. 2618 aluminum alloy Gold ceramic coating on piston crowns Gray Teflon coating on piston skirts H13 tool steel piston pins with .185” wall thickness Includes Total Seal Advanced Profile ring set with 1.2 mm. steel top ring, 1.2 mm. second ring and 3.0 mm. oil ring. Diamond Racing pistons are custom manufactured at the time you place your order. Please allow four to eight weeks for delivery. We use a conventional AP Steel ring set with the 3.705 bore size. The 3.720 bore size uses a Gapless Top AP Steel ring set.
