Details
Lunati 60138751K5 Signature Series 3.875" Stroke Crankshaft and Connecting Rod Kit for Chevrolet Small Block

The Highest Quality Rods for Your Race Engine - Forged from 4340 aircraft quality steel and CNC-machined using the latest technology, these rods are race ready out of the box.
Strict Tolerances for High End Performance - Signature Series Crankshafts feature radiuses that are ground to 0.125", while the roundness of each journal is held to 0.0001" or less. These tight tolerances contribute to Signature Cranks ability to withstand up to 1,500 Horsepower. Signature Series Rods are weight matched to within + or - 1 gram.
The Only Choice for Serious Racers - Lunati Signature cranks feature a contoured wing counterweight ensures reduced windage, while gun-drilled mains and lightened rod journals lighten rotating mass.
Reach Your Power Band Faster and Finish Strong - Lightening holes in rod journals reduce crankshaft inertia which enables increased acceleration. Signature Series Cranks are pulsed plasma nitride heat treated for increased strength and durability. Both main and rod journals are micropolished.
These Lunati Signature Series Rods feature a 6.000" Length, fit a 2.100" Crank Journal Outer Diameter, have a 0.927" Wrist Pin Outer Diameter, a 0.940" Big End Width and average 620 Grams.
Fit Chevrolet Small Block engines w/ 2 Piece Rear Main Seals and 350 Mains
Made in USA
Premium Construction for High Strength - Lunati Signature Series Cranks are constructed from 4340 non-twist steel forgings for durability and strength in high performance and racing applications.