NITTO H-beam connecting rods are manufactured using the highest quality one piece 4340 forged billet steel round stock and have been designed as a first stage upgrade for the price conscious racer.NITTO I-beam connecting rods are manufactured using the highest quality one piece 4340 forged billet steel round stock and have been designed specifically for extreme motorsport use. Its design lends itself to being slightly lighter and superior in strength than the traditional H-beam connecting rod and far exceeds any OEM produced connecting rods for strength and durability.Using NITTO's one piece round billet design ensures a uniform flow of the material grain which ensures maximum strength especially when compared to the cheaper manufactured two piece designs commonly found at the lower end of the market. Although the manufacturing process is more time consuming and expensive, NITTO's no compromise approach ensures you get the best connecting rod on the market.Both NITTO I-beam and H-beam connecting rods feature quality ARP rod bolts and silicone bronze wrist pin bushes to ensure reliability and durability under the most remanding conditions.NITTO H-beam connecting rods are for use in applications that require a strengthened link between the crankshaft and piston but do not require the heavy duty link of an I-beam connecting rod.NITTO I-beam connecting rods are for use in applications that require a "NO COMPROMISE" link between the crankshaft and piston and are at home in any high RPM, extreme horsepower application. 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 Profiling 100% CNC Drilling & Tapping
