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Factory Valve Size is 31
which can occur when the main caps shift or move out of position
Piston Sets Include:
These pistons are built to handle extreme horsepower
and 11127620698 for the BMW N20 and N26 engines
ARP Head Stud Kit, BMW S14 NA Factory Valve Size is 31This ARP head stud Kit is designed for the BMW S14 B20, S14B23, S14B25, S14B27 engines found in the E30 M3. Installing ARP head studs can provide several benefits, including increased clamping force, improved head gasket sealing, and greater overall engine strength. This is especially important in high performance and racing applications where the engine is subjected to increased stress and higher temperatures. Before installing ARP head studs, it is
