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5.7 Hemi 392 Stroker Crank 6.1 Hemi 426 Stroker Crankshaft K1 Technologies Forged Chrysler Dodge 5.7 6.1 Magnum Hemi Stroker Cranks

K1 Technologies Dodge 5.7 Hemi Stroker Crank  Logo Image

K1 Technologies produces very high quality Dodge Chrysler 5.7 and 6.1 Hemi stroker forged steel cranks. We are proud to be a distributor of  all premium K1 modern Mopar Hemi engine products. K1 Tech is producing extremely strong 4340 forged 5.7 Hemi crank assemblies that are machined to very close tolerances and are far stronger than a stock 5.7 liter or 6.1 liter Hemi engine crankshaft. K1 produces these excellent modern hemi stroker cranks with two different size rod journals.

5.7 Hemi Stroker Kits

If you are looking for all the parts for a complete 5.7L Hemi stroker kit instead of just a crankshaft, you can find all of those parts on our website here: 5.7 Hemi Stroker Pistons, Crank, Rods and Bearings

4340 Forged Steel 5.7 Hemi 6.1 Hemi Stroker Crank

K1 Technologies 5.7 6.1 Hemi Crankshaft 5.7L Hemi Stroker Crank

More K1 Technologies product info here: K1 Technologies Crankshafts and K1 Rods


K1 Technologies 4340 Forged Steel 5.7L Hemi Crankshaft Specifications

These crankshafts will fit in either a 5.7 liter or 6.1 liter Hemi engine block. The main difference in the 5.7 and the 6.1 is the stock bore size. Stock for a 5.7L is 3.917 inches and 6.1L has a stock bore size of 4.055 inches. Depending on which block and final bore size you choose to use, you can build stroker hemi engines using these cranks of 393 cubic inches up to 428 cid.

Buy the best K1 Technologies small block Mopar Hemi stroker crankshafts here. We offer dedicated customer service, technical assistance and reasonable prices.

Dodge 5.7 and 6.1 Hemi 392 426 Stroker Cranks by K1 Technologies 4340 Forged Crankshafts

All of the K1 Tech 6.1 and 5.7 Hemi Crankshaft part numbers listed below have the following common features and dimensions:

  • 4340 forged steel
  • Core hardened
  • Nitrided
  • Mag-Particle Inspected
  • Straight oil holes for best rod journal lubrication
  • Stock 5.7L 6.1L Hemi main journal size of 2.559 in.
  • 8 bolt Chrysler rear flange
  • One of the 4.080 stroker cranks with a standard bore 5.7 Hemi block = 392 cubic inches
  • One of the 4.080 stroker cranks with a .020 over 5.7 Hemi block = 398 cubic inches
  • Use one of the 4.080 cranks with a .025 over 6.1 Hemi block = 426 cubic inches
  • Wt = weight in pounds
  • We recommend using the matching K1 4340 Billet H beam Hemi rods with these cranks
  • Wiseco forged pistons for use with these cranks are listed here: 5.7 Hemi Stroker Pistons
  • These cranks use the 4 bolt reluctor attachment pattern which is the stock 6.1 pattern. The 4 bolt reluctor will work with the K1 stroker crank and either a 5.7 or 6.1 Hemi engine. No reluctor gear is included with the crankshaft. The reluctor gear is available here 5.7 6.1 Hemi Reluctor Gear

Description Stroke Rod Pin Wt Part #
SB Chrysler Hemi Stroker Crankshaft 4340 Forged Crank 3.795 Stroke 2.100 rod journal 3.795 2.100 56

k1 345-3795SB6F

Sold out, Discontinued by K1

Replaced by Molnar Technologies 345-3795JB6F

SB Chrysler Hemi Stroker Crankshaft 4340 Forged Crank 4.080 Stroke 2.000 rod journal 4.080 2.000 56

k1 345-4080SA6F

$1161.69 $1161.11

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K1 Technologies Dodge 5.7 Hemi 6.1 Hemi crankshaft assemblies are 4340 forged cranks for superior strength and durability. These 5.7 Hemi crank assemblies are ideal for any small block hemi performance muscle car rebuild, street car, hot rod, nostalgia dragster, supercharged, 5.7 Hemi turbo and nitrous engines, all out racing engines, marine, tractor pull, mud bog engines and more.

Chrysler Dodge Mopar 5.7 6.1 and 6.4 Hemi Reluctor Gear

Molnar 5.7 6.1 6.4 hemi reluctor ring

For use with Molnar Technologies Gen3 Hemi Crankshafts

Description Part #

This reluctor gear is the correct one to use with Molnar Technologies Gen 3 Hemi stroker cranks in engines requiring a 32 tooth reluctor. It uses a 4 bolt attachment which is the same as the OEM Chrysler 6.1 crankshaft. The 2003 - 2008 5.7 and 6.1 used the 32 tooth wheel.



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If you have a 2009 or newer Gen3 Hemi with a 58 tooth reluctor and a Molnar Technologies crankshaft, this is the correct gear for you. (NOTE: Some people count the teeth on the 2009 and later as 60, but difference is only in how people count the large teeth, so even though some people say 58 and some 60, they are both the same reluctor) MRR-60

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2013 and Newer:

Chrysler / Dodge changed the OEM reluctor and engine management system in 2013. If you are working with a 2013 or newer vehicle and a Molnar Technologies crankshaft, then this is the proper 58 tooth reluctor to use.


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If you are building a hard running Dodge small block Hemi engine, why risk using a lesser quality crankshaft in your project? At our discounted prices, you get a premium top quality, high performance K1 crankshaft, for not much more than lesser brand cranks.

K1 Technologies small block Mopar Hemi 5.7 and 6.1 stroker cranks on this page are available to fit the following engine blocks:

  • Dodge 5.7L Hemi
  • Dodge 6.1L Hemi
  • Chrysler 5.7 liter Hemi
  • Chrysler 6.1 liter Hemi
  • Crate engines and aftermarket blocks based on the stock 5.7 6.1 hemi block specs

We also offer a large variety of pistons to work with these small block Hemi cranks including Wiseco forged pistons, supercharged and turbocharged pistons, nitrous pistons, stroker pistons, custom pistons and more. We also sell bearings, gaskets, valvetrain parts and more.

If you can not find the engine parts you need, or if you have questions, please contact us and we will be happy to help you.





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