Ferrea valve springs feature increased spring pressure

Push RPM Limits: Safely increase your RPM to 9600 for maximum performance

Screw studs into the block “HAND TIGHT ONLY”

Wideband Control

4 mm with 0

ARP Main Stud Kit, BMW S14 E90 M3 Ferrea valve springs feature increasedThis ARP Main Stud Kit is designed to replace BMW 11111735525 for the S14 B20, S14B23, S14B25, S14B27 engines found in the E30 M3. One significant advantage of these main studs is their ability to prevent main cap walk, which can occur when the main caps shift or move out of position, potentially causing damage to the engine. In addition, ARP Main Studs can safeguard the threads of your engine block, providing an extra layer of protection against