Eagle 4340 steel crankshafts for Honda and Acura engines. Available for B16A, B18A/B NON-VTEC, F20C, F22C, K20 and K24. Some cranks are forged, some are billet. Please review all specs carefully, do all your research and consult your engine builder if necessary before purchase.
Important Notes:
Crankshaft must be balanced to match your specific rods and pistons.
Double check all specs and confirm before purchase
Purchase Includes:
(1) Crankshaft
| Engine: | Stroke: | Part Numbers: | Specs: |
| B16A | 85mm (3.335″) | 1633341772 | Discontinued OCT 2023 |
| B18A/B NON-VTEC | 87mm (3.433″) | 1835041772 | Discontinued MAR 2024 • Material: Forged 4340 Steel • Intended Balance: Internal • Stroke: 3.504″ • Rod Journal: 1.771″ • Rod Journal Width: 0.945″ • Main Journals: 2.164″ • Minimum Rod Length: 5.29″ • Typical Weight: 30 Pounds |
| F20C/F22C | 96.5mm (3.799″) | 3F2037995893 | • Material: Billet 4340 Steel • Intended Balance: Internal • Stroke: 3.799″ • Rod Journal: 1.889″ • Rod Journal Width: 0.956″ • Main Journals: 2.165″ • Minimum Rod Length: 5.893″ • Typical Weight: 35 Pounds • Required use with 1.067″ pin height pistons |
| K20/K24 | 93mm (3.661″) | 3K2036615470 | • Material: Billet 4340 Steel • Intended Balance: Internal • Stroke: 3.661″ • Rod Journal: 1.889″ • Rod Journal Width: 0.794″ • Main Journals: 2.165″ • Minimum Rod Length: 5.47″ • Typical Weight: 35 Pounds • Required use with 1.043″ pin height pistons |
| B16A | – | 1630311772 | Not Available |
| B18A/B NON-VTEC | 95mm (3.740″) | 1837401772 | Discontinued July 2021 |
| B18C VTEC | 87mm (3.433″) | 1834331772 | Discontinued May 2021 |
| B18C VTEC | – | 1835431772 | Not Available |
| B18C VTEC | – | 1633341772LW | Not Available |
What’s the difference between billet and forged?
Eagle billet 4340 steel crankshafts feature .125″ fillet radiuses for superior strength so chamfered / narrowed bearings required, nitrided surface, & micropolished to < 2 ra.
Eagle forged 4340 steel cranks feature a non-twist forging, .125″ fillet radiuses for superior strength so chamfered / narrowed bearings required, nitrided surface, & micropolished to < 2 ra. Intended for the most demanding applications.
