Nitto 4340 Billet Steel crankshafts are manufactured from high quality true billet round bar stock. Most other aftermarket crankshafts are manufactured using cast forged material, which is a much cheaper manufacturing process and hence carry a cheaper price tag, but their performance, strength and horsepower capabilities are significantly compromised compared to that of a true billet crankshaft. An engine with a 4340 billet steel crankshaft will rev faster and cleaner due to the different harmonics produced from the high grade material.

Furthermore, we also offer our EN40B crankshafts in order to cater for the sector of the market that seek to produce power in excess of 2000hp reliably. The EN40B material is superior to the 4340, offering the benefits of increased performance capabilities while weighing the same as 4340. In the EN40B variant of the SR20 crankshaft, we have also added 3 dowel pin holes to the flange of the crankshaft, while the proven design of the remainder of the crankshaft is the same.

All of our 4340 and EN40B cranks are

• 4340/EN40B Billet Round Bar Stock
• Grade Tested (X-ray - Sonic)
• Quenched and Heat Treated
• Fully Counter Weighted
• Nitrided
• Balanced
• Knife Edged (where applicable)
• 100% CNC Profiled
• 100% CNC Drilled and Tapped