With thermal-resistant properties

the factory OEM block's spray-on iron layer falls short

MLS gaskets provide superior sealing

5″ diameter

it was sent to military manufacturing

ARP Head Stud Kit, BMW N20 / N26 E60 LCI With thermal-resistant propertiesUpgrade the performance of your BMW N20 N26 engine with our custom designed Head Stud Kit, brought to you by ARP the world leader in fastener technology. This kit is engineered to replace BMW part #'s 11127620958, 11127583138, and 11122212157 and is compatible with BMW N20 and N26 turbocharged inline four engines found in a range of 3 Series, 4 Series, 5 Series, and X Series models. This kit offers increased clamping force and enhanced head gasket