Connecting Rods compatible for Toyota 1ZZ FE,1ZZ 2ZR FE 1.8L Engine MWR Bolt Set (8) Toyota Lotus 1ZZ 2ZZ 2GR 2ZR Flywheel OEM TTY ARP Head Stud Kit for ARP Toyota 1ZZFE 1.8L 4 Cylinder ID Workz Genuine Toyota Flywheel Bolt Kit 8pcs (2JZ) "V160 V161 6 Speed" ARP Head Stud & Nut Kit for Toyota Corolla Celica T Sport 2ZZGE ZZT231 ARP Toyota 1.8L 1ZZ FE and 2ZR FE 2000 Series Head Stud Kit KamiSpeed.com. All Pro Series flywheel bolt kits feature an exclusive flat 12 point head design and a larger than stock underhead radius for increased strength. Each bolt is centerless ground to ensure the bearing surface is perpendicular to the threads creating equal load distribution and are nominally rated at 200,000 psi. Optimum design, enhanced reliability and increased strength are the main attributes of ARPs Pro Series flywheel bolt kits. Fits Toyota 1. 8L 2ZZGE 4 cylinder Socket Size(s) 5 8 12pt UHL 0. 875 Thread Size M10 x 1. 25