A strong stroker kit for a 350 should match the exact engine family and include the rotating parts needed for your build; the Eagle Chevy 350-383 assemblies suit small-block Chevy projects, while the other listings target Yamaha ATVs. The two Eagle kits share a 3.750-inch cast crank but differ in rod length and piston type. This roundup also includes a Hot Rods Raptor bottom-end kit, a Banshee crankshaft kit, and two Raptor piston listings, which are not interchangeable with the Chevy kits.
Start by identifying your engine, then compare the listed stroke, rod, piston, and included components. The product names use “350” for different engines, so checking fitment before ordering matters as much as choosing a specific stroker configuration.
For a small-block Chevy 350 build, the Eagle Chevy 350-383 Street & Strip Kit with 6.000-inch rods is the strongest listed choice. It combines a balanced 3.750-inch cast crank, forged 4032 Mahle pistons, file-fit rings, bearings, damper, and a 168-tooth flexplate. That set of listed components makes it the most complete Chevy option here.
If your project instead uses a Yamaha Raptor or Banshee, choose only among the ATV-specific listings and verify exact model fitment.
Our Top Picks
Best OverallIts balanced 3.750-inch cast crank, 6.000-inch rods, forged Mahle pistons, bearings, damper, and flexplate make it the most fully specified Chevy 350-383 set.
View on Amazon
Flat-Top Piston OptionThis Chevy 350-383 kit has a balanced 3.750-inch cast crank, 5.700-inch rods, and KB -7cc flat-top pistons with bearings.
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Raptor Bottom-EndHot Rods Raptor Bottom-End Kit
For Yamaha Raptor 350 and Warrior applications, it includes a stroker crankshaft, main bearings, and gasket set, and specifies a 379cc result with +4mm stroke.
View on Amazon- Banshee Crank Kit Banshee +4mm Crankshaft Kit
Compare these stroker kit options
| # | Product | Weight | Dimensions | Buy |
|---|---|---|---|---|
| 1 | 1. Eagle 6.000-Inch Rod KitBest Overall | 120 lb | — | View on Amazon |
| 2 | 2. Eagle 5.700-Inch Rod KitFlat-Top Piston Option | 120 lb | — | View on Amazon |
| 3 | 3. Hot Rods Raptor Bottom-End KitRaptor Bottom-End | 9 lb | 18 x 7.8 x 7.8 in | View on Amazon |
| 4 |  4. Banshee +4mm Crankshaft KitBanshee Crank Kit | 1.76 oz | 0.39 x 0.39 x 0.39 in | View on Amazon |
| 5 |  5. Generic Raptor Cast Piston KitRaptor piston replacement shoppers | — | — | View on Amazon |
| 6 |  6. Fantparts Raptor Cast Piston KitRaptor cast-piston part shoppers | — | 1 x 1 x 1 in | View on Amazon |
Detailed Reviews: Best Stroker Kit For 350
#1 · Best Overall
1. Eagle 6.000-Inch Rod Kit
- Weight: 120 lb
Best for: Chevy street-and-strip builders.
Why it ranks #1: Its balanced 3.750-inch cast crank, 6.000-inch rods, forged Mahle pistons, bearings, damper, and flexplate make it the most fully specified Chevy 350-383 set.
A balanced 3.750-inch cast crank paired with 6.000-inch I-beam rods gives this Eagle kit a defined rotating-assembly foundation for a Chevy 350-to-383 build. Its forged 4032 MAHLE pistons, file-fit rings, bearings, damper, and flexplate also provide a broad set of named components for assembling the engine.
The 6.000-inch I-beam rods use 3/8-inch ARP 8740 bolts, while the 4.030-inch pistons have a -16cc inverted dome; those dimensions and piston shape help builders select components around a specific 383 combination. Plasma-moly file-fit rings and King SI rod and main bearings are included, alongside a damper and 168-tooth flexplate. Because the kit is listed as balanced, it brings those rotating components together as a balanced assembly rather than a loose parts list.
- Balanced 3.750-inch cast crank
- 6.000-inch I-beam rods with 3/8-inch ARP 8740 bolts
- Forged 4032 MAHLE -16cc inverted-dome pistons
- Includes file-fit rings, King SI bearings, damper, and 168-tooth flexplate
- Uses a cast crank rather than a forged crank.
Skip it if you need 5.700-inch rods and flat-top pistons; the Eagle B001O06DIS kit lists that combination instead.
For Chevy 350 builders planning a street-and-strip 383 assembly, this kit groups a balanced crank, long rods, pistons, and supporting hardware. Check that its 6.000-inch rods and inverted-dome pistons suit your intended combination.
Full product details
| Brand | Eagle |
|---|---|
| Item Weight | 120 pounds |
| Item model number | B13002L03068 |
| Manufacturer | Eagle |
| Part Number | B13002L03068 |
| Model | Rotating Assembly |
Listed on Amazon as: Chevy 1PC 350-383 Eagle Balanced Street & Strip Stroker Kit (B13002L03068)
View on Amazon#2 · Flat-Top Piston Option
2. Eagle 5.700-Inch Rod Kit
- Weight: 120 lb
Best for: Chevy builders needing flat-top pistons.
Why it ranks #2: This Chevy 350-383 kit has a balanced 3.750-inch cast crank, 5.700-inch rods, and KB -7cc flat-top pistons with bearings.
A balanced 3.750-inch cast crank paired with 5.700-inch I-beam rods gives this Eagle kit a distinct configuration for a Chevy 350-to-383 build. Its 4.030-inch hypereutectic KB flat-top pistons and standard-gap rings make the piston and ring setup the key differentiator from other assemblies.
The 5.700-inch rods use 3/8-inch ARP 8740 bolts, while the 4.030-inch KB pistons have a -7cc flat top; these named dimensions help builders compare the assembly with their intended engine combination. Plasma-moly standard-gap rings and King SI rod and main bearings are included. The balanced rotating assembly combines those parts around a 3.750-inch cast crank, but the listing does not name a damper or flexplate among its included components.
- Balanced 3.750-inch cast crank
- 5.700-inch I-beam rods with 3/8-inch ARP 8740 bolts
- 4.030-inch hypereutectic KB -7cc flat-top pistons
- Includes standard-gap plasma-moly rings and King SI rod and main bearings
- Uses hypereutectic pistons rather than forged pistons.
Skip it if you want forged 4032 pistons with an inverted dome; Eagle B01MQH2I7E lists that piston configuration for its Chevy 350-to-383 kit.
For Chevy 350 builders seeking a balanced street-and-strip 383 assembly with 5.700-inch rods and flat-top pistons, this kit lists the key rotating parts. Confirm that its hypereutectic piston configuration suits your build.
Full product details
| Brand | Eagle |
|---|---|
| Item Weight | 120 pounds |
| Item model number | B13055E030 |
| Manufacturer | Eagle |
| Part Number | B13055E030 |
| Model | Rotating Assembly |
Listed on Amazon as: Chevy 350-383 Eagle Balanced Street & Strip Stroker Kit (B13055E030)
View on Amazon#3 · Raptor Bottom-End
3. Hot Rods Raptor Bottom-End Kit
- Weight: 9 lb
- Dimensions: 18 x 7.8 x 7.8 in
Best for: Raptor bottom-end rebuilders.
Why it ranks #3: For Yamaha Raptor 350 and Warrior applications, it includes a stroker crankshaft, main bearings, and gasket set, and specifies a 379cc result with +4mm stroke.
A +4mm stroker crankshaft that makes the engine 379cc gives this Hot Rods bottom-end kit its defining build outcome. The package also includes main bearings, seals, and a complete gasket set, supporting a broader engine reassembly for the listed Yamaha YFM 350 R Raptor 350 X Warrior applications.
The crankshaft, main bearings, seals, and complete gasket set bring core bottom-end rebuild parts together, which can simplify sourcing for a full reassembly. The +4mm stroke is specified to make the engine 379cc, while the application listing spans Yamaha YFM 350 R Raptor 350 X Warrior models from 1988–2013. A Vertex stroker piston 23616A is required, so plan for that separate matching component before starting the build.
- +4mm stroker crankshaft makes the engine 379cc
- Includes main bearings and seals
- Includes a complete engine gasket set
- Lists Yamaha YFM 350 R Raptor 350 X Warrior, 1988–2013
- Requires a separate Vertex stroker piston 23616A.
Skip it if you already have a different stroker piston planned; this kit specifies Vertex 23616A, while the Generic 23616A cast piston kit is listed separately.
For Yamaha 350 Raptor or X Warrior rebuilders targeting the stated 379cc result, this package supplies major bottom-end parts and gaskets. Its required Vertex 23616A piston is a separate fit consideration.
Full product details
| Brand | Hot Rods |
|---|---|
| Item Weight | 9 pounds |
| Item model number | CBK0136 |
| Manufacturer | Hot Rods |
| Part Number | CBK0136 |
| Model | CBK0136 |
| Dimensions | 18 x 7.8 x 7.8 inches |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Hot Rods Bottom End Kit for Yamaha YFM 350 R Raptor 350 X Warrior 1988-2013
View on Amazon#4 · Banshee Crank Kit
4. Banshee +4mm Crankshaft Kit
- Weight: 1.76 oz
- Dimensions: 0.39 x 0.39 x 0.39 in
Best for: Banshee +4mm crankshaft buyers.
Why it ranks #4: This Yamaha Banshee YFZ350 listing includes a +4mm stroker crankshaft with a 115mm rod and gaskets, but does not fit a Chevy 350.
A +4mm stroker crankshaft with a 115mm rod is the defining component in this Yamaha Banshee YFZ350 package. The listing also includes a gasket, giving Banshee owners a crankshaft-and-gasket combination for the stated 1987–2006 application rather than a Chevy 350 rotating assembly.
The stated Banshee YFZ350 fitment from 1987–2006 narrows the application, while the 115mm rod length and +4mm stroke identify the listed crankshaft configuration. One gasket is included with the crankshaft, which can support installation planning, though the package description does not identify a larger collection of rebuild parts. The listing describes the part as easy to install and reliable to use, but gives no additional installation steps or engine output figures.
- +4mm stroker crankshaft
- 115mm long rod
- Lists Yamaha Banshee YFZ350 fitment for 1987–2006
- Includes one gasket with the crankshaft
- The listed application is Yamaha Banshee YFZ350, not a Chevy 350.
Skip it if you are assembling a Chevy 350-to-383; Eagle B01MQH2I7E is listed for that application, unlike this Yamaha Banshee crankshaft.
For a Yamaha Banshee YFZ350 owner seeking the listed +4mm, 115mm-rod crankshaft, the included gasket is a useful package detail. Its stated fitment is specific to the 1987–2006 Banshee.
Full product details
| Brand | Generic |
|---|---|
| Item Weight | 1.76 ounces |
| Item model number | GN4LFX4GHY |
| Manufacturer | Generic |
| Part Number | GN4LFX4GHY |
| Model | GN4LFX4GHY |
| Dimensions | 0.39 x 0.39 x 0.39 inches |
Listed on Amazon as: Crankshaft W/Gaskets +4mm Stroker for Yamaha Banshee YFZ350 115mm Rod
View on Amazon#5
5. Generic Raptor Cast Piston Kit
Best for: Raptor piston replacement shoppers.
Why it ranks #5: The listing identifies a cast piston kit for the Yamaha YFM 350 R Raptor, but provides no additional specifications or included components.
A cast piston specified for the YFM 350 R Raptor from 2004–2011 gives this kit a narrow, model-specific focus. Its listing identifies part number 23616A, helping buyers distinguish this piston kit from complete bottom-end assemblies when planning a Raptor engine repair or build.
The stated YFM 350 R Raptor fitment range of 2004–2011 is the key selection detail, so buyers can assess whether this cast piston kit matches their application. The listing identifies 23616A as both the catalog and manufacturer part number, a useful reference when coordinating the piston with other engine components. It does not describe a crankshaft, bearings, or gaskets; treat it as a piston kit rather than a complete bottom-end package.
- Identifies the YFM 350 R Raptor application
- Lists 2004–2011 fitment
- Cast piston construction is stated
- Provides catalog and manufacturer part number 23616A
- The listing identifies a piston kit, not a complete bottom-end assembly.
Skip it if you need a crankshaft, bearings, and a complete gasket set; Hot Rods CBK0136 lists those bottom-end components for the Raptor 350.
For a YFM 350 R Raptor owner seeking a cast piston kit, the stated 2004–2011 range and 23616A reference are the relevant details. It is not the listed choice for a complete bottom-end rebuild.
Full product details
| Brand | Generic |
|---|---|
| Manufacturer | huyhuyhuy |
Listed on Amazon as: #US Stroker Cast Piston Kit for YFM 350 R Raptor (04-11) 23616A
View on Amazon#6
6. Fantparts Raptor Cast Piston Kit
- Dimensions: 1 x 1 x 1 in
Best for: Raptor cast-piston part shoppers.
Why it ranks #6: This replacement cast piston kit names the Yamaha Raptor 350 and model reference 23616A, but it is a piston listing rather than a complete stroker assembly.
A cast stroker piston listed for the Yamaha YFM 350 R Raptor from 2004–2011 gives this replacement-parts kit a focused application. Its listing names part reference 23616A and advises comparing the item’s physical appearance, making those details central to evaluating whether it suits a particular replacement need.
The named YFM 350 R Raptor application and 2004–2011 range narrow the intended use, while the 23616A reference provides another point for identifying the part. The listing describes a cast stroker piston kit and a one-piece package, rather than a set of bottom-end rebuild components. It specifically calls for comparing physical appearance as well as using the model number, so buyers should assess the pictured part against their intended replacement.
- Cast stroker piston kit is specified
- Lists Yamaha YFM 350 R Raptor application
- States 2004–2011 model range
- Provides 23616A reference and advises appearance comparison
- The package is listed as one piece, not a complete engine rebuild kit.
Skip it if you need a crankshaft, bearings, and gasket set for a rebuild; Hot Rods CBK0136 lists those parts for Yamaha 350 Raptor and X Warrior applications.
For a Raptor owner sourcing the listed cast piston replacement, the application range and 23616A reference help frame selection. This is a one-piece piston package, not a complete stroker bottom-end kit.
Full product details
| Brand | Generic |
|---|---|
| Item model number | FANT-TPP-PL-060526-32183 |
| Manufacturer | Fantparts |
| Dimensions | 1 x 1 x 1 inches |
Listed on Amazon as: #US Replace Parts Stroker Cast Piston Kit for Yamaha YFM 350 R for Raptor (04-11) 23616A – (fant5526#32183)
View on AmazonAvoid mixing Chevy and ATV 350 applications
The main compatibility trap is treating every listing that says “350” as a match for the same engine. The Eagle products are Chevy 350-383 rotating assemblies, while the Hot Rods kit is for Yamaha YFM 350 R Raptor and Warrior applications, and the crank listing is for a Yamaha Banshee YFZ350. The two cast piston kits also name the Raptor, not a Chevy small-block.
These parts serve different engine platforms and should not be cross-shopped as interchangeable kits. Even within an engine family, verify the exact year, model, and configuration against the manufacturer’s fitment information before ordering.
The Hot Rods listing specifically says it must be used with Vertex stroker piston 23616A, a detail that makes checking the compatible piston especially important. A familiar displacement label alone does not establish fitment.
How to Choose a Stroker Kit for a 350
Engine family and fitment
Choose the engine family first, because these listings cover distinct Chevy and Yamaha applications. The Eagle assemblies are for a Chevy 350-383 build; the Hot Rods kit lists Yamaha YFM 350 R Raptor and Warrior fitment; the Banshee crank listing names Yamaha YFZ350. The two cast piston products specifically list the Raptor 350.
If your project is a Chevy small-block, the Eagle kits are the relevant choices. For a Raptor or Warrior rebuild, consider Hot Rods and confirm model-year compatibility.
For a Banshee, the Banshee-specific crank listing is the only relevant fit. Verify exact fitment rather than relying on “350” in a title.
Crank stroke and connecting-rod length
Compare the listed stroke and rod dimensions with your build requirements. Both Eagle Chevy kits specify a 3.750-inch cast crank; one pairs it with 6.000-inch I-beam rods and the other with 5.700-inch I-beam rods. The Hot Rods Raptor kit specifies a +4mm stroke and says the resulting engine is 379cc, while the Banshee kit also lists +4mm stroke with a 115mm rod.
The Eagle choices suit Chevy buyers deciding between those listed rod lengths. The Yamaha listings serve separate engine families, so their measurements are not alternatives to the Chevy dimensions.
Confirm compatibility with your engine and build plan before choosing.
Piston type and kit contents
Check both the piston specification and what the package actually includes. The Eagle 6.000-inch rod kit lists forged 4032 Mahle -16cc inverted-dome pistons; the 5.700-inch kit lists hypereutectic KB -7cc flat-top pistons. Both list bearings, while the first also specifies rings, a damper, and a 168-tooth flexplate.
Hot Rods supplies a crankshaft, main bearings, and gasket set, and calls for a Vertex stroker piston. The Banshee listing includes a crankshaft and gaskets; the Raptor piston listings do not describe a complete rotating assembly.
Buyers seeking a packaged Chevy assembly should compare the Eagle contents, while Yamaha rebuilders should check which additional components their kit requires.
Which Stroker Kit Should You Choose?
For a Chevy 350-383 build seeking a broadly specified rotating assembly, choose the Eagle 6.000-Inch Rod Kit: its listed package includes a balanced 3.750-inch crank, forged pistons, rings, bearings, damper, and flexplate. Choose the Eagle 5.700-Inch Rod Kit if its shorter listed rods and hypereutectic flat-top pistons suit your planned configuration. For a Yamaha Raptor or Warrior bottom-end rebuild, consider the Hot Rods Raptor Bottom-End Kit, while noting its specified Vertex piston requirement.
A Banshee owner should look at the Banshee +4mm Crankshaft Kit instead. The Generic Raptor Cast Piston Kit and Fantparts Raptor Cast Piston Kit are piston-only listings, not complete stroker assemblies.
Confirm engine fitment and required supporting parts before ordering any option.
Frequently Asked Questions
How do I confirm whether a stroker kit fits my exact engine year and configuration?
Match the listing to your engine family, model, year, and configuration, then confirm fitment with the seller or manufacturer before ordering. The products here cover both small-block Chevy and specific Yamaha applications, which are not interchangeable. For ATV listings, verify the exact model and any stated piston or crankshaft requirements.
What supporting parts or machine work might be needed when installing a stroker kit?
Check the package contents against your build plan and have an engine machinist confirm what work is required for your specific block and rotating assembly. Kits vary: some list components such as a crank, pistons, rings, and bearings, while the Generic and Fantparts Raptor listings are piston-only. Do not assume every needed part is included.
How should I choose between cast and forged pistons for my intended engine use?
Choose based on your intended use and the requirements of the complete engine build, rather than piston material alone. The listed Chevy 6.000-inch-rod kit includes forged 4032 Mahle pistons, while the 5.700-inch-rod kit is described with hypereutectic flat-top pistons. Confirm compatibility and build requirements with an engine professional.
How can I tell whether a listing is a complete assembly or a piston-only kit?
Read the listed contents rather than relying on the word “kit” in the title. The Eagle Chevy package lists a crank, pistons, rings, bearings, damper, and flexplate; the Generic and Fantparts Raptor listings are piston-only. Confirm every required component before ordering, since the package contents determine what else your build may need.
Which listed option should I consider for a Yamaha Banshee rather than a Raptor?
For a Banshee, consider the listing specifically titled for a Yamaha Banshee YFZ350: the +4mm crankshaft kit with gaskets and a 115mm rod. The Raptor piston and bottom-end listings are for different Yamaha applications. Verify exact model fitment and the parts required for your rebuild before selecting any kit.
Final Words
For a small-block Chevy 350-383 build, the Eagle 6.000-inch-rod kit is the strongest listed choice when its included components suit your plan. Consider the 5.700-inch-rod option only if its listed rods and hypereutectic flat-top pistons fit your configuration. For Yamaha projects, choose the listing for your exact Raptor, Warrior, or Banshee application; distinguish piston-only listings from assemblies, and confirm fitment and supporting needs before ordering.
