Small Block Chevy 383 Short Block Eagle Crank Rods Coated Pistons Clevite

This is a completely assembled 383 short block. Has Eagle 103503750 3.750 crankshaft, Eagle ESPSIR6125BBLW connecting rods, Speedmaster PCE305-1008 flat top pistons, GM 2 bolt main engine block, flexplate, harmonic balancer, Clevite main, rod, and cam bearings, LPC Performance rings, Amsoil assemble lube, professionally built. It is ready to finish assembly with your parts. Other parts are available through our store and also we can finish this motor to your liking for additional cost. Here are the details of the parts. 

Eagle cast steel crankshafts are the most dependable option when you don't want to break the bank. Each crank is inspected for dimension, size, and stroke accuracy. For improved efficiency and reliability, they have a journal finish of 6 R.A. or less and a target bob weight of +/- 2 percent for easy balancing. The crankshaft is the heart of your engine, so demand the best—order the Eagle Specialty model and performance options recommended for your vehicle year, make, and engine application.

Why spend time and money reconditioning your stock rods—when you can upgrade to a set of Eagle SIR I-Beam connecting rods for less? They're forged from 5140 steel for outstanding strength and reliability, and they come in both press-fit and bushed pin models. Their lightweight design places less stress on the rest of your rotating assembly to increase engine life and better handle high-rpm use. The rods are X-rayed, sonic-tested, magnafluxed, and shot-peened to stress-relieve the metal. They come with 12-point ARP Wave-Lok rod bolts and are weight-matched to within two grams. The big end sizing is controlled by in-house CNC equipment to ensure precise machining and accurate fitment. Order the individual rod or set recommended for your year/make and engine application.

Eagle SIR I-Beam connecting rods, they're forged from 5140 steel for outstanding strength and reliability, and they come in both press-fit and bushed pin models. Their lightweight design places less stress on the rest of your rotating assembly to increase engine life and better handle high-rpm use. The rods are X-rayed, sonic-tested, magnafluxed, and shot-peened to stress-relieve the metal. They come with 12-point ARP Wave-Lok rod bolts and are weight-matched to within two grams. The big end sizing is controlled by in-house CNC equipment to ensure precise machining and accurate fitment. Order the individual rod or set recommended for your year/make and engine application.

Speedmaster hypereutectic pistons have a high silicon content alloy which contributes to excellent tensile and fatigue strength, improved thermal characteristics, greater hardness, and increased resistance to scuffing. These pistons offer a more quiet operation and cost less than forged pistons—plus, they're an excellent choice for street performance, bracket racing, and oval track. They are strong, lightweight, thermally efficient, they can run tight piston-to-wall clearances (which improves ring seal and longevity), and they have exceptional wear resistance. Hypereutectic aluminum pistons are mean to provide performance at a reasonable price. Order the set recommended for your vehicle application.

Rear Main Seal Style: 2-piece
Engine Stroke (in.): 3.750 in.
Crankshaft Material: Cast steel
Engine Balance: External
Lightened: No
Requires Narrow Bearings: No
Rod Bearings Included: Yes
Main Bearings Included: Yes
Rod Journal Diameter (in): 2.100 in.
Crankshaft Snout Style: Standard

Piston Rings Included: Yes
Bore (in.): 4.040 in.
Stroke: 3.750 in.
Engine Stroke Type: Stroked
Rod Length: 6.125 in.
Piston Style: Flat top, with two valve reliefs
Piston Material: Hypereutectic aluminum
Compression Height (in.): 1.100 in.
Piston Head Volume (cc): +4.00cc
Wrist Pin Style: Floating
Wrist Pin Retainers Included: Yes
Wrist Pin Included: Yes
Pin Diameter (in): 0.927 in.
Piston Ring Thickness: 1.5mm 1.5mm 3.0mm
File Fit: No
Gapless:No

Connecting Rod Length Center to Center (in.): 6.125 in.
Connecting Rod Beam Style: I-beam
Connecting Rod Material: Forged 5140 steel
Connecting Rod Finish: Shot-peened
Wrist Pin Style: Floating
Rod Journal Diameter (in): 2.100 in.
Pin End Bore Diameter: 0.927 in.
Clearanced for Stroker: No
Cap Retention Style: Cap screw
Connecting Rod Bolt Brand: ARP
Connecting Rod Bolt Diameter: 3/8 in.
Connecting Rod Bolt Material: 8740 chromoly steel
Fastener Tensile Strength (psi): 160,000 psi
Connecting Rod Bolt Head Style: 12-point
Approximate Connecting Rod Weight (g): 600
Advertised Horsepower Rating: 500 hp
Advertised RPM Rating: 6,000 rpm
Weight Matched Set: Yes
Remanufactured: No
Magnafluxed: Yes

Engine Crankshaft Undersize (in.): Stock
Engine Crankshaft Undersize (mm): Stock
Bearing Material:Tri-metal, TM-77
Dowel Pin Hole: No
Narrow Bearing: No
Engine Crankshaft Undersize (in.): Stock

Ring Gear Tooth Quantity: 168-tooth
Flexplate Diameter: 14.000 in.
Rear Main Seal Style: 2-piece
Engine Balance: External
Flexplate Material: Steel

Engine Balance: External
Degree Markings: Yes
Outside Diameter (in): 7.990 in.
Keyway Quantity: Stock
Harmonic Balancer Material: Nodular iron
Harmonic Balancer Construction: Elastomer
Harmonic Balancer Finish: Black painted
Mounting Hardware Included: No