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LS1 and LS Series Crankshafts

We have a large variety of high performance and racing 4340 forged steel crankshafts for the GM LS series engines. We have stock stroke and many different length stroker cranks. These cranks are all available with either a 24 tooth or 58 tooth reluctor to match your requirements.

When you are ready to make more power and need to step up to a premium 4340 forged steel crank, we have what you need. We have top quality LS cranks from Molnar Technologies and K1 Technologies. We also sell the matching 4340 billet steel connecting rods for use in LS engines.

Buy the best LS1 crankshafts here. We offer top quality performance products, dedicated customer service, technical assistance and reasonable prices.

molnar technologies logo

Molnar LS1 Crankshaft

Molnar Technologies LS series engine crankshafts are available in several different configurations. Molnar cranks are premium forged cranks made from 4340 grade steel and precision machined to exacting tolerances.

The Molnar Technologies brand LS1 Crankshaft part numbers listed below have the following common features:
  • 4340 forged steel
  • Core hardened
  • Nitrided
  • Mag-Particle Inspected
  • Straight oil holes for best rod journal lubrication
  • Stock LS1 main journal size of 2.559 in.
  • Rod journal diameter is 2.100 in.
  • 6 bolt LS1 rear flange
Stroke Description and Notes Rod Pin Dia. Main Journal Size Min
Rod
Length
Bob
Weight
Part # and Price

CHEVY LS Series Engine Crankshafts

4.000 4.000" Stroke GM LS Series Crank with 24 tooth ring 2.100 LS 6.100 1800 346-4000LB6F-610-24
$1003.88 $867.05

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4.000 4.000" Stroke GM LS Series Crank with 58 tooth ring 2.100 LS 6.100 1800 346-4000LB6F-610-58
$1003.88 $867.05

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4.125 4.125 Stroke GM LS Series Crank with 24 tooth ring 2.100 LS 6.100 1800 346-4125LB6F-610-24
$1003.88 $867.05

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4.125 4.125 Stroke GM LS Series Crank with 58 tooth ring 2.100 LS 6.100 1800 346-4125LB6F-610-58
$1003.88 $867.05

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Chevrolet LS7 Long Snout

4.000 4.000" Stroke GM LS7 long snout crank with 24 tooth ring 2.100 LS 6.100 1800 346-4000LB6F-LS7-24
$0.00
Contact us for availability!
4.000 4.000" Stroke GM LS7 long snout crank with 58 tooth ring 2.100 LS 6.100 1800 346-4000LB6F-LS7-58
$1151.12 $994.22

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4.100 4.100 Stroke GM LS7 long snout crank with 24 tooth ring 2.100 LS 6.100 1800 346-4100LB6F-LS7-24
$0.00
Contact us for availability!
4.100 4.100 Stroke GM LS7 long snout crank with 58 tooth ring 2.100 LS 6.100 1800 346-4100LB6F-LS7-58
$1151.12 $994.22

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K1 Technologies LS1 Crank Logo Image

K1 Tech is producing extremely strong 4340 forged LS1 crank assemblies that are machined to very close tolerances and are far stronger than a stock LS1 crankshafts. K1 produces these excellent cranks in a stock stroke model as well as 5 different length LS1 stroker cranks.

LS1 Stroker Crank

K1 Technologies 4340 Forged Steel LS1 Crankshaft Specs

The LS1 crank assemblies are available with either a 24 tooth or a 58 tooth reluctor ring. The final two digits of the part number indicate which reluctor gear is installed. This applies to the stock stroke and the LS1 stroker crank part numbers.

All of the K1 Tech LS1 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 LS1 main journal size of 2.559 in.
  • Rod journal diameter is 2.100 in.
  • 6 bolt LS1 rear flange
  • Wt = weight in pounds

We recommend the use of K1 Technologies 4340 Billet H beam LS1 connecting rods with these cranks

LS1 Crankshafts Description Stroke Wt Part #
Chevy LS1 crank, 3.622 stock stroke, 24 tooth reluctor 3.622 51

k1 346-3622RB6F-24

$835.44 $793.67

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Chevy LS1 forged crank, 3.622 stock stroke, 58 tooth reluctor 3.622 51

k1 346-3622RB6F-58

$835.44 $793.67

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Chevy LS1 forged LS1 crankshaft, 3.900 stroker, 24 tooth reluctor 3.900 52

k1 346-3900RB6F-24

$835.44 $793.67

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Chevy LS1 forged crank, 3.900 stroker, 58 tooth reluctor 3.900 52

k1 346-3900RB6F-58

$835.44 $793.67

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Chevy LS1 forged crank, 4.000 stroker, 24 tooth reluctor 4.000 52

k1 346-4000RB6F-24

$835.44 $793.67

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Chevy LS1 forged crank, 4.000 stroker, 58 tooth reluctor 4.000 52

k1 346-4000RB6F-58

$835.44 $793.67

Add To Cart
Chevy LS1 forged crank, 4.100 stroker, 24 tooth reluctor 4.100 53

k1 346-4100RB6F-24

$835.44 $793.67

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Chevy LS1 forged LS1 crankshaft, 4.100 stroker, 58 tooth reluctor 4.100 53

k1 346-4100RB6F-58

$835.44 $793.67

Add To Cart
Chevy LS1 forged crank, 4.125 stroker, 24 tooth reluctor 4.125 53

k1 346-4125RB6F-24

$835.44 $793.67

Add To Cart
Chevy LS1 forged crank, 4.125 stroker, 58 tooth reluctor 4.125 53

k1 346-4125RB6F-58

$835.44 $793.67

Add To Cart
Chevy forged LS1stroker crank, 4.250 in. 24 tooth reluctor 4.250 54

k1 346-4250RB6F-24

$835.44 $793.67

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Chevy forged LS1 stroker crank, 4.250 in. 58 tooth reluctor 4.250 54

k1 346-4250RB6F-58

$835.44 $793.67

Add To Cart

 

LS1 and LS Series Engine Connecting Rods

If you are building a hard running Chevrolet LS series engine, why risk using lesser quality rods in your project? Upgrade to superior strength and dependability with a set of 4340 billet steel rods which combined with one of the cranks on this page will help you build a high performance, dependable rotating assembly capable of handling far greater power levels than stock components.

Molnar Technologies  LS Connecting Rods

molnar connecting rod

molnar technologies h beam rod edge

We have the full range of Molnar rods which are available to cover a large range of engine types. To view all of the available rods please click > Molnar Technologies Connecting Rods

Molnar Technologies Connecting Rods Specs

Molnar Technologies H Beam rods are machined from billet 4340 steel, and then heat treated to provide improved strength. To make the rods even stronger, they are shot peened to which also increases fatigue life. All Molnar connecting rods are fitted with highly durable premium bronze bushings for use with floating pin type pistons. Each rod set includes ARP fasteners, moly lubricant and installation guidelines.

All Molnar rods are finished in the United States at the Molnar Technologies shop in Michigan. Critical rod dimensions are are held to very precise tolerances of +/- .0001 of an inch, which is the tightest tolerance you will find in the performance and racing aftermarket.

Molnar Connecting Rods Part Numbers and Application Info

  • Length Length of the connecting rod, as measured center to center, in inches.
  • Weight Weight in grams, of one complete connecting rod assembly
  • Notes Additional information about specific applications
  • Bolt Size Bolt diameter in inches, Rods come with ARP2000 fasteners installed
  • Rod Pin Size Crank rod journal diameter
  • Pin Size Piston pin diameter, in inches or millimeters
  • BE Width Width of the crankshaft end of one rod
  • PE Width Width of the piston end of one rod
  • Part Number Molnar Technologies Connect Rod set part number
  • Price The price shown is for a complete set of rods for the engine.
Rod Length Weight Description Bolt Size Rod Pin Size Pin Size BE Width PE Width Part Number

Chevy LS

6.125 Chevy LS 602 6.125 LS Lightweight for use in normally aspirated engines with no power adders. 7/16 2.100 0.927 0.940 1.010 CH6125NLB-LS8-A

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6.125 654 LS1 Chevy Turbo Heavy duty rod for big boost levels or large nitrous shots. 7/16 2.100 0.927 0.940 1.010 CH6125NLB-LST8-A

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6.200 620 LS1 Chevy 7/16 2.100 0.927 0.940 1.010 CH6200NLB-LS8-A

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K1 Technologies LS Engine Rods

K1 Tech is producing an extremely strong set of 4340 billet LS1 connecting rods at a reasonable price for the LS1 series engines. These LSX, LS2, LS7 and LS1 connecting rods are machined to very close tolerances and are far stronger than the original equipment rods.

K1 H beam rods include ARP2000 bolts. All of these LS1 rods both stock and stroker LS1 connecting rods are bushed for use with full floating piston pins. These rods are ideal for any muscle car rebuild project, hot rod, nostalgia dragster, supercharged Chevy LS series engines, custom street car, drag race, etc.

Chevrolet LS1 Connecting Rods

K1 GM LS Engine Series Connecting Rods

  • These rod sets come complete with 7/16 ARP 2000 rod bolts (except supreme lite set CH6125ALLB-LSSL-8A which uses 3/8"), bronze bushings, instructions and ARP moly lube
  • All of the K1 LS rods listed below are "on center the same as factory LS1 rod sets"
  • C-C = Length of rod, center to center, in inches
  • Bore = Rod big end housing bore diameter in inches
  • CPS = Crank pin size ( rod journal size ), in inches, that rod is designed to work on.
  • WPS = Wrist pin size that rod is designed to work with
  • Wt = Weight of 1 rod, in grams
Description Housing Bore Size Crank Pin Size Wrist Pin Size Bolt Size Weight Part Number
Stock length 6.098 Chevy LS1 rods with ARP2000 bolts 2.225" 2.100" .927" 7/16" 659 CH6098ALLB-LS8-A

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6.125" length rods with ARP2000 bolts. Recommended for turbo, supercharged and big nitrous engines 2.225" 2.100" .927" 7/16" 660 CH6125ALLB-LS8-A

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6.125" LS1 Chevy Stroker Rod This rod is specifically designed for use in stroker engines. The rod provides more camshaft clearance in the bolt thread area. It uses a shorter bolt and is designed with strengthening "ears" in this area to retain strength even with the additional clearance. 2.225" 2.100" .927" 7/16" 651 CH6125ALLBLS-ST8-A

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6.125" length Lightweight rods with ARP2000 bolts. Recommended for all normally aspirated engines. 2.225" 2.100" .927" 7/16" 616 CH6125ALLB-LSL8-A

Contact us for availability!

6.125" LS1 Chevy Supreme Lightweight Bushed

NOTE: Made for 7,600 max RPM applications with lightweight pistons and 3.622 stroke.

2.225" 2.100" .927" 3/8" 507

CH6125ALLB-LSSL8-A

Sold out, Discontinued by K1

6.390" LS1 Chevy Bushed Stroker Rod 2.225" 2.100" .927" 7/16" 653 CH6390ALLBLS-ST8-A

Contact us for availability!
6.450" LS1 Chevy Lightweight Bushed 2.225" 2.100" .927" 7/16" 624 CH6450ALLB-LSL8-A

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