Pontiac 400 455 4340 Forged Steel Crankshaft ST-4.25 M-3.25 RJ-2.200 RMS-2Pc Ext

These Speedmaster crankshafts are made from the same strong aircraft-quality forging as standard-weight cranks, but have profiled counterweights for less weight. Speedmaster lightweight crankshafts are perfect for engines wanting quicker rpm. These crankshafts feature profiled aero-wing counterweights and have straight shot and chamfered oil holes. Speedmaster crankshafts are nitride-hardened, with large radii on all journals for superior wear resistance, and use lightening holes in all rod throws.

Brand:	Speedmaster
Part Number:	PCE276.1140
Part Type:	Crankshaft
Product Line:	4340 Forged Steel
Rear Main Seal Style:	2-piece
Engine Stroke (in):	4.250 in.
Crankshaft Material:	Forged 4340 Steel
Engine Balance:	External
Lightened:	Yes
Requires Narrow Bearings:	See notes below
Rod Bearings Included:	No
Main Bearings Included:	No
Rod Journal Diameter (in):	2.250 in.
Main Journal Diameter (in):	3.250 in.
Minimun Rod Length (in):	6.700 in.
Balancer Bolt Thread Size:	Standard
Crankshaft Snout Style:	Standard
Quantity:	Sold individually.
Notes:	Check the bearing to crank radius clearance. Rod bearings may need to be chamfered or alternatively use narrow rod bearings.
Tool:	Stroker Combinations