Suitable for TB48de engine. Rods are 4340 Forged and come with 7/16 ARP Rod bolts Grade Tested (X-Ray & Sonic) 4340 Billet Steel ONE Piece Forging  Quenched and Heat Treated Shot Peen Hardness Treated (38HRC) Doweled Cap for Superior Alignment Quality ARP 2000 Series Bolts Optional ARP Custom Age 625 Plus Series Bolts Silicone Bronze Pin End Bushes Balanced to Within a +/- 1 Gram Tolerance Per Set Bore Diameters to Within +/- 0.0001" Tolerance Sunnen Honing Machines Along with Sunnen Diamond Honing Tooling are used for both Big & Pin End Machining and Sizing 100% CNC Profiled 100% CNC Drilled & Tapped

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