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K1 Chevy. 350. 3.480" Crankshaft Assy.

Stock Code:
012DAD348
Stock Level
In Stock
$1,343.45
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K1 - Crankshaft

Part Number: 012DAD348
Application: Chevrolet Small Block (350 ci) engines
Manufacturer: K1 Technologies
Type: Forged crankshaft — performance/race-ready.

Key Specifications

  • Engine Fitment: Chevrolet 350 small block V8 (5.7 L) — classic SBC platform.

  • Stroke: 3.480 inches (88.4 mm) — shorter stroke than the 3.750″ or 4.000″ stroker versions.

  • Main Journal Diameter: 2.450″ — standard Chevy 350 main size.

  • Rod Journal Diameter: 2.100″ — compatible with standard SBC rod journals.

  • Flange Type: 6‑bolt crank flange (typical for small block Chevy).

  • Material: Forged 4340 steel, core hardened and nitrided for maximum strength and bearing life.

  • Finish & Testing: Magnetic particle inspected; tight machining tolerances (~±0.0001″).

  • Rear Main Seal: Standard 2‑piece style.

  • Bearings: Not included — you will need to source main and rod bearings separately.

Application & Build Notes

  • Designed to be a direct‑fit crankshaft for Chevy small block 350 engines where the builder wants a lighter stroke than the factory 3.48/3.48 range for either a specific build character (e.g., high revving) or destroking application.
  • Ideal for performance and racing engines where stronger, forged steel crank strength and tighter tolerances are desired over stock cast cranks.
  • Works with standard small block Chevy blocks and rotating assemblies — rods and pistons must match the 3.480″ stroke and appropriate rod length to achieve your desired displacement and compression ratio.