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Crankshaft, 4340 Steel, Forged, 4.000 in. Stroke, Chevy LS, 58-Tooth Reluctor, Each
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Overview
Brand:
Manufacturer's Part Number:
BTRCRA4000F158
Part Type:
Product Line:
Summit Racing Part Number:
BTC-S0391
Engine Stroke (in.):
4.000 in.
Crankshaft Material:
Forged 4340 steel
Engine Balance:
Internal
Rear Main Seal Style:
1-piece
Reluctor Wheel Tooth Quantity:
58
Lightened:
No
Requires Narrow Bearings:
Yes
Rod Bearings Included:
No
Main Bearings Included:
No
Rod Journal Diameter (in.):
2.100
Main Journal Diameter (in.):
2.559 in.
Balancer Bolt Thread Size:
M16 x 2.0
Crankshaft Snout Style:
Standard
Quantity:
Sold individually.
BTR Forged Crankshafts
Brian Tooley Racing's premium 4340 forged crankshafts are available for serious street and race LS engines. Each crank is core-hardened using nitride for improved strength, bearing life, and size tolerances held to +/- .0002 in. BTR has either a 3.622 in., 3.900 in., or 4.000 in. stroke, along with three different reluctor wheel options—including standard factory 24 and 58 tooth wheels, or an upgraded 24 tooth billet wheel. A standard wet sump snout and 6-bolt rear flange will allow you to bolt on your factory balancers and flywheels/flexplates or the many aftermarket pieces offered.
Product features include:
* 2.100 rod journal diameter
* .125 in. radius on both the connecting rod journals and main journals for increased strength
* Chamfered oil holes for improved oiling
* Leading edge chamfer and radius on counterweights
* BTR balanced rotating assembles are available separately
NOTE: BTR crankshafts require an OEM style, one-piece crank gear.
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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