Connecting Rods compatible for Toyota 1ZZ FE,1ZZ 2ZR FE 1.8L Engine Conrod Bolt Kit ARP for TOYOTA 1.8L (2ZZGE) Connecting Rods compatible for Toyota 1ZZ FE,1ZZ 2ZR FE 1.8L Engine Clutch and Flywheel Twos R Us. 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