Contents
- Here is a list of the best 383 Stroker build kits:
- 1. Eagle Specialty Products B13404E-030 Balanced Rotating Assembly for Small Block Chevy – the best 383 stroker kit
- 2. Northern Auto: 5.7″ rod 383 Stroker Engine Kit w/ Wiseco Flattop Forged Race Pistons (.030 Bore)
- 3. Northern Auto parts: 383 Chevy Stroker Kit With 6″ Rods
- 4. Guardian Engine Parts: Chevrolet 383 Stroker 4.030″ Bore Piston Engine Rebuild Kit
- 5. Northern Auto Parts: 383 Stroker Kit for 1-piece rear main seal
The 383 was not a Chevy production line model; it was the development of a private car block engine builder that was looking for a more powerful solution to the standard 350 boxes. This individual realized that he could machine a 400ci small-block crank to fit in a 350 block. This would give him added ci and reached the famous 383 ci.
| Photo | Product name | Features | Pro’s | More information |
|---|---|---|---|---|
 | 1. Eagle Specialty Products B13404E-030 Balanced Rotating Assembly for Small Block Chevy | This is Eagle Specialty Products 383, Stroker Kit | Steel Cast Crankshaft Full Kit | View on Amazon |
 | 2. Northern Auto: 5.7" rod 383 Stroker Engine Kit w/ Wiseco Flattop Forged Race Pistons (.030 Bore) | This is the Northern Auto Parts 5.7" rod 383 Stroker Engine Kit w/ Wiseco Flattop Forged Race Pistons | Mahle/Clevite Rod and Main Bearings Spirolox | View on Amazon |
 | 3. Northern Auto parts: 383 Chevy Stroker Kit With 6" Rods | This is the Northern Auto Parts 383 Chevy Stroker w/ 6" Rod Neutral Balance | Mahle/Clevite Rod and Main Bearings Spirolox | View on Amazon |
 | 4. Guardian Engine Parts: Chevrolet 383 Stroker 4.030" Bore Piston Engine Rebuild Kit | This is the Chevrolet 383 Stroker 4.030" Bore Piston Engine Rebuild Kit | Clevite77 Bearings 2pc rear main seal | View on Amazon |
 | 5. Northern Auto Parts: 383 Stroker Kit for 1-piece rear main seal | This is the Northern Auto Parts 383 Stroker w/ 1 piece rear seal crankshaft #1803AL | Clevite77 Rod Bearings Clevite77 Main Bearings | View on Amazon |
This guide was created to make sense of these 383 blocks, and give you a list of the best 383 Stroker build kits that can be found online.
Here is a list of the best 383 Stroker build kits:
1. Eagle Specialty Products B13404E-030 Balanced Rotating Assembly for Small Block Chevy – the best 383 stroker kit
Review
The Eagle Chevy Street Performance Rotating Assemblies are always a great value for money, and this kit is no exception to that rule. It comes with all the necessary parts to rebuild a 383 stroker kit for engines that are under 500HP.
This kit comes with an original Eagle cast steel crankshaft, Eagle SIR I-Beam rods, Speed Pro hypereutectic pistons, Hastings rings, and King bearings.
Specifications
- Manufacturer’s Part Number: B13404E030
- Engine Balance: External
- Rear Main Seal Style: 2-piece
- Actual Engine CID: 383
- Bore: 03” (102.362mm)
- Connecting Rod Beam Style: I-beam
- Connecting Rod Material: Forged 5140 steel
- Crankshaft Material: Cast steel
- Engine Stroke (in.): 75
- Main Bearing Undersize: Stock
- Piston and Ring Oversize (in.): 03
- Piston Head Volume (cc): 12
- Piston Material: Hypereutectic aluminum
- Piston Ring Facing Material: Plasma-moly
- Piston Style: Dish, with a D-shaped cup
- Rod Bearing Undersize: Stock
- Wrist Pin Style: Press-fit
2. Northern Auto: 5.7″ rod 383 Stroker Engine Kit w/ Wiseco Flattop Forged Race Pistons (.030 Bore)
Review
This kit includes the Mahle/Clevite Tri-Metal P series bearings are the industry standard since these patents came out. The Clevite 77 is considered the best bearing on the market with thousands of racing miles behind them.
Specifications
- Wiseco Forged Flattop Pistons w/ 2 valve reliefs
- Hastings Moly Rings
- Mahle/Clevite Rod and Main Bearings
- 6″ Scat 4340 Forged Bushed Rods w/ ARP Cap Screw
- Scat 9000 Series Neutral Balance Pro Comp Stroker Crankshaft (Aerowinged Design)
- Forged Wiseco pistons w/ spirolox
- Flattop 2 valve reliefs
Piston Information:
- 140″ compression height (.015″ taller than most pistons)
- Compression ratio 11.15 to 1 with block decked .010 for near Zero Deck (64cc)
- 2618 Forged Aluminum Alloy
- Spirolox Included
3. Northern Auto parts: 383 Chevy Stroker Kit With 6″ Rods
Review
This Northern Auto 383 rotating kit is one of their newest Stroker Kits, and its price gives you great value for money. This is the 6” rod version.
Specifications
- Wiseco Forged Flattop Pistons w/ 2 valve reliefs
- Hastings Moly Rings
- Mahle/Clevite Rod and Main Bearings
- 6″ Scat 4340 Forged Bushed Rods w/ ARP Cap Screw
- Scat 9000 Series Neutral Balance Pro Comp Stroker Crankshaft (Aerowinged Design)
Piston Information:
- Forged Wiseco pistons
- Flattop 2 valve reliefs
- 440″ compression height (.015″ taller than most pistons)
- Compression ratio 11.15 to 1 with block decked .010 for near Zero Deck
- 2618 Forged Aluminum Alloy
- Spirolox Included
4. Guardian Engine Parts: Chevrolet 383 Stroker 4.030″ Bore Piston Engine Rebuild Kit
Review
This 383 Stroker kit comes with a 2pc rear main seal and has a 5.7” connection rod. The comprehensive parts kit delivers great value for money.
Specifications
- Piston kit in 4.030″ Bore Size and .010″ Rod and Main bearing sets
- Clevite77 Bearings (+.010″ undersize)
- Fel-Pro Gaskets
- Moly Rings
- HV Oil Pump
- Row Timing Set
- BRASS Freeze Plugs
- Cloyes double row 3pc timing set
- 2pc rear main seal with a 5.70″ long Connecting Rod
- Melling High Volume Oil Pump with steel shaft drive rod
5. Northern Auto Parts: 383 Stroker Kit for 1-piece rear main seal
Review
This is a Northern Auto Parts kit with full components for a 1 piece rear seal crankshaft. What is great about this kit is that NAP allows you to request bore size as std, .020, .030, .040 or .060, specify Flattop Compression Ratio for 64.0cc: 10.40 to 1, and specify Dished Pistons Compression Ratio for 64.0cc: 9.67 to 1.
Specifications
383 Stroker w/ 1-piece rear seal crankshaft
- Moly Piston Rings
- Speed Pro Pistons (full floating)
- Clevite77 Rod Bearings
- Clevite77 Main Bearings
- Scat 9000 Series Stroker Crankshaft for 1 pc rear main seal
- Scat Forged Rods w/ ARP Cap Screws
- 8″ Harmonic Balancer
- 168 Tooth Flexplate
- Balanced rotating assembly
What exactly is a “Stroker engine” or a “stroker kit?
A Stroker engine is an engine that increased its original factory stroke size. A stroker kit is a package containing all the components to build a stroker engine.
The benefits of a stroker engine come from the combined changes made to the way the engine burns fuel. Burning fuel is not just about how much fuel you inject into the engine, it’s also about how much air you compress together with the fuel.
This why increasing the stroke will increase the breathing capacity of the engine; you still need to match a camshaft, head flow, and many other elements. So, when buying a 383 model, you have to make sure it is matched with all the right assemblies to pull out of it maximum effectivity.
Two-Piece Vs. One-Piece Seals
The two-piece seal is an older version; these were used between 1955 to 1985 in all small block Chevys. In 1986, GM changed the design and fabricated a one-piece rear main seal. Take note that the older 2-piece rear seal model can be converted to a one-piece model, the one-piece model cannot be adapted or changed into a two-piece model. The one-piece crank uses a smaller flywheel bolt pattern when compared to the two-piece design; this means that flywheels and flexplates do not interchange between these models.
Fabricators/Distributors
You will have noticed that we picked a few items to show off the variations in 383 models. However, we confined ourselves to two suppliers that have a proven history of supplying quality products. These fabricators and suppliers are:
Northern Auto Parts
Northern Auto Parts has been around for 25 years and has a large online presence too. This Iowa based company is located in Sioux City and has a 60,000 square foot fabrication, upgrading and showroom site.
Eagle Specialty Products
Eagle Specialty Products is an auto parts fabricator and distributor located in Southaven, Mississippi. This company produces high-strength connecting rods and crankshafts for racing engines. They also offer a full line of kits including crank, rods, pistons, rings, and bearings for popular engine combinations.
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