Bolts: Including ARP 2000 3/8" bolts (Note: Extra cost for upgrading to ARP L19 bolts). For MAZDA 2.0L FS FS-DE ENGINE. ARP 2000 bolts ,Optional ARP L19 fasteners available as an upgrade；. Conrods Connecting Rods for Rover K series Coupe 1.8 ARP 2000 Bolts 5.24".