4.250" Stroke Crankshafts-store.440source.com

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40042506800-6

Crankshaft
This crank is popular for doing 512" stroker setups in a low deck 400 block. This crank features the 2.2" (Chevy) smaller and lighter rod journals which allow you to use any off the shelf big block Chevy rods with perfect side clearance. The reduced diameter counterweights allow for easy block clearancing. This crank has the following specs: Stroke: 4.250" / Block Type: B / Main Journal Diameter: 2.625" / Rod Journal Diameter: 2.200" / Rod Journal Width: 2.009" / Pre-Balanced Bobweight: 2300 Grams / Counterweight Diameter: 7.120" / Flange Bolts: 6 x 7/16".

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44042506800-6

Crankshaft
This crank is popular for doing 512" stroker setups in an "RB" (413/426/440) block. This crank features the 2.2" (Chevy) smaller and lighter rod journals which allow you to use any off the shelf big block Chevy rods with perfect side clearance. Crank has the following specs: Stroke: 4.250" / Block Type: RB / Main Journal Diameter: 2.750" / Rod Journal Diameter: 2.200" / Rod Journal Width: 2.009" / Pre-Balanced Bobweight: 2400 Grams / Counterweight Diameter: 7.480" / Flange Bolts: 6 x 7/16".

In Stock

40042506800-6-LW

Ultralight Crankshaft
Our new 4.250" stroke ultralight crankshafts are great for those 512 stroker motors. Since this combination already uses a lightweight piston, we undercut the crankshaft counterweights and profile the flange into a star shape, which takes about an additional 4 pounds (1800 grams) off this model crank. Click on the "View Additional Images" button on the product page to see more. Although the 512 is a quick revving combination even with a standard crankshaft, this ultralight crank will really make it rev like a streetbike. This crank features the 2.2" (Chevy) smaller and lighter rod journals which allow you to use any off the shelf big block Chevy rods with perfect side clearance. The reduced diameter counterweights allow for easy block clearancing. This crank has the following specs: Stroke: 4.250" / Block Type: B / Main Journal Diameter: 2.625" / Rod Journal Diameter: 2.200" / Rod Journal Width: 2.009" / Pre-Balanced Bobweight: 2300 Grams / Counterweight Diameter: 7.120" / Flange Bolts: 6 x 7/16".

In Stock

44042506800-6-LW

Ultralight Crankshaft
Our new 4.250" stroke ultralight crankshafts are great for those 512 stroker motors. Since this combination already uses a lightweight piston, we undercut the crankshaft counterweights and profile the flange into a star shape, which takes about an additional 6.5 pounds (almost 3000 grams) off this model of crank. Click on the "View Additional Images" button on the product page to see more. Although the 512 is a quick revving combination even with a standard crankshaft, this ultralight crank will really make it rev like a streetbike. This crank features the 2.2" (Chevy) smaller and lighter rod journals which allow you to use any off the shelf big block Chevy rods with perfect side clearance. Crank has the following specs: Stroke: 4.250" / Block Type: RB / Main Journal Diameter: 2.750" / Rod Journal Diameter: 2.200" / Rod Journal Width: 2.009" / Pre-Balanced Bobweight: 2400 Grams / Counterweight Diameter: 7.480" / Flange Bolts: 6 x 7/16".

In Stock

42642506800-8

SCAT Crankshaft -8 Bolt Hemi Flange
We now offer these SCAT brand Crankshafts, featuring their super strong 4340 non twist steel forgings. These feature an 8 bolt "HEMI" style flange, "RB" (2.750") main journal size, and use 2.200" (Big Block Chevy) size rod journals.

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101-1017

HD Alloy Woodruff Key - New
New Heavy Duty Alloy Factory Type (half-moon shape) woodruff key. Use for all engines, all years. Package of ONE woodruff key.

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101-1018

Woodruff Key - High Performance - New
New Heavy Duty Alloy woodruff key. Use for all engines, all years. This "performance" style uses extended "points" on the top of the key to allow more contact area with the crank gear of the timing set. Package of ONE woodruff key.

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Crankshaft

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Crankshaft

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Ultralight Crankshaft

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Ultralight Crankshaft

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SCAT Crankshaft -8 Bolt Hemi Flange

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HD Alloy Woodruff Key - New

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Woodruff Key - High Performance - New

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