For Subaru Impreza WRX STI EJ20 EJ22 EJ25 Engine. For Subaru Legacy EJ20 EJ22 EJ25 Engine. Bolts: Including ARP 2000 3/8" bolts (Note: Extra cost for upgrading to ARP L19 bolts). ARP 2000 bolts ,Optional ARP L19 fasteners available as an upgrade；.
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