these 16 valve pistons are offered in 81.5 and 82.0 bores, compressions of 11 and 12:1 * they are normally aspirated - Pistons come with 20mm pins, but we can custom make them with 18 or 19mm pins as well -
for more questions or to order custom pistons, please email us at sales@traumpistons.com whatsApp chat at +1 (424) 448-2875