K1 Technologies 4.375" Stroke Forged Steel BBC Crankshaft
$879.00
In stock (5 available)
This crankshaft works with 6.385" rods.
Horsepower rating for this crank is approx. 800+
- Much stronger than stock OEM cast cranks
- Chamfered oil holes for improved high RPM oiling
K1 Technologies Forged Crankshafts
K1 Technologies forged crankshafts offer world-class design that's affordable. Their energy transfer technology forges top-quality crankshafts from 4340 steel that's core-hardened and tempered to reduce stress and optimize tensile strength. K1 uses a nitriding process for hardening--not induction heat-treating--to eliminate softening between the journals and any post-running deformation. The forged crankshafts feature straight oil holes for the best oiling to the rod journals, to ensure that you're getting the most and the best for your dollars. Counterweights are placed for optimal load reduction and ease of balancing--meaning less work for you--and each crankshaft is magnetic particle inspected, as well as held to a maximum tolerance of .0002 in. journal dimension. K1 Technologies forged crankshafts offer high performance to meet your high standards!
Important Note.
This crankshaft must be balanced with your pistons and rods before use.
For use in big block Chevy engines with the 2 piece style rear main seal. 4.375" stroker crank. This crank requires the use of an INTERNAL damper and flexplate or flywheel.
Upgrades:
Crank polishing:Â Extends bearing life, reduces oil temp, frees up a slight amount of average horsepower. This is a very low cost upgrade, and in the world of mass production, most cranks do not come with a true polished finish. This is why most machine shops have a machine to do this. The difference is dramatic between a crank right out of the box and one that we have polished. Bearing companies claim that cranks that have better finishes on the journals will survive the break-in better, and have much longer bearing life. We do a three step process and bring the RA numbers down in the single digit range. We have the most advanced crank polishing machine on the market. We find this to be an excellent upgrade for your engine build, considering the low cost. We polish the crank for every engine we build.
Cost for this crank polishing upgrade is $38.50. Before you finalize your purchase of this assembly you may add any of these upgrades to your shopping cart.
The appearance of the journals show a dramatic difference once polished.
Product Information
| UPC | 012GAG438 |
|---|---|
| Product Type | Crankshaft |
| Price (excl. tax) | $879.00 |
| Price (incl. tax) | $879.00 |
| Tax | $0.00 |
| Availability | In stock (5 available) |
| Narrow Bearing | Yes |
| Brand | K1 Engine |
| Crankshaft Material | Forged 4340 steel |
| Rear Main Seal Style | 2 piece |
| Rod Journal Diameter (in) | 2.75 |
| Shipping Cost | 45.0 |
| Shipping Weight (lbs) | 82.0 |
| Stroke (in) | 4.375 |
| Number of reviews | 0 |
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