Eagle Small Block Mopar Stroker Kits 340 360 408 410 5.9 Magnum Stroker Kits & Rotating Assemblies

Mopar 340, 360 and 5.9L magnum engines make good torque and horsepower, even with a stock stroke crankshaft (the 340 is a little weak at low rpm due to the short stroke), but an Eagle small block Mopar rotating assembly or stroker kit will improve the performance and durability of these engines considerably. If you are rebuilding a 340 Mopar and want a stronger rotating assembly, but do not want to go to a stroker crank, we have a stock stroke 340 competition kit for you in addition to the 340 and 360 stroker kits. We offer stock stroke 360 rotating assemblies, Dodge, Plymouth, Mopar 360 stroker kits, and Dodge 5.9L Magnum stroker kits. We also offer custom piston options on these basic stroker kits, so if you want something like a different compression ratio piston, or different bore size piston, or both with your kit, we will be happy to take care of that for you. If you want a piston set with different specifications in your stroker engine kit please contact us and let us know what you are looking for and we will be happy to get a quote back to you, for your exact application.
SBM Rotating Assembly and Stroker Kit Quick Index Jump Links:
If you do not see a kit on our site that includes the items you want, or you need a different bore size or compression piston, please contact us and we will be happy to help you with a custom configured stroker kit. We can also put together a kit using different brand components if required.

We offer the Eagle 340 stock stroke rotating assembly, and also the new Eagle 340 stroker kit assemblies. We do have 340 stroker kits
available in both the Street Strip version as well as the Competition level kits in pre-balanced and un-balanced versions.
We have the 360 Mopar based engines covered with Eagle stock stroke rotating assemblies and Eagle 360 stroker kits and 5.9L Magnum stroker kits in both the basic street strip type and the full competition kits. These kits are available balanced or un-balanced if you prefer to have your local machine shop do the balance work for you.
340 5.9 Magnum 360 Engine Kit Rotating Assembly Contents Description
Our Eagle small block Mopar stroker engine kits offer a great balance of strength,
performance, dependability and affordability. Each of these kits includes either a Eagle
cast steel crankshaft (street strip kits) or a 4340 forged steel crankshaft (competition
kits), I beam or ESP 4340 H beam connecting rods, forged pistons with valve reliefs, moly
file fit piston rings, main and rod bearings. The 340 360 and 5.9 Magnum stroker
kit comes with a crankshaft that is designed to be used as internal balance. The
cast crankshaft kits are designed to be used as internal balance, as are the kits including
a forged crank are to be used as part of an internal balance assembly.
Chrysler Dodge Plymouth Mopar 340 Engine
340 Street / Strip
Eagle Mopar 340 Street and Strip Rotating Assemblies
Description of specs and parts included in Street & Strip 340 rotating assembly kits
- Stock Specs: 340 standard bore is 4.040, stock stroke is 3.31, stock rod length is 6.123, stock wrist pin size is .984
- CID: Cubic inch displacement of engine
- Bore: Finished cylinder bore size, in inches that pistons are designed to work in
- Crankshaft: Eagle cast steel, stroke in inches as listed in table
- Connecting Rods: Eagle 5140 I beam, stock length of 6.123 inches with .984 wrist pin
- Piston: Type and displacement of valve reliefs and dish or dome
- Compression: Compression ratio with different head chamber cc sizes
- Notes: Eagle rates these kits for 500hp and less
Part numbers with a "B" after eag in the part number indicate that the price for that kit includes balancing before
shipping to you. Part numbers without the B in the part number must be balanced before
installation into your engine. |
|
Compression |
|
CID |
Bore
Size |
Stroke |
Rod |
Piston |
60cc |
65cc |
70cc |
Kit # |
340 |
4.040 stock |
3.310 stock |
6.123 I-Beam |
forged
Mahle Flat top -5cc |
10.2 |
9.6 |
9.1 |
eag 20504
|
eag B20504
|
345 |
4.070 .030 over |
3.310 stock |
6.123 I-Beam |
forged
Mahle FT -5cc |
10.2 |
9.6 |
9.1 |
eag 20504 30
|
eag B20504 30
|
410 |
4.040 stock |
4.000 stroker |
6.123 I-Beam |
forged Mahle inv dome -28cc |
9.5 |
9.1 |
8.8 |
eag 20505
|
eag B20505
|
416 |
4.070 .030 over |
4.000 stroker |
6.123 I-Beam |
forged Mahle inv dome -28cc |
9.6 |
9.2 |
8.9 |
eag 20505 30
|
eag B20505 30
|
410 |
4.040 stock |
4.000 stroker |
6.123 I-Beam |
forged
Mahle Flat top -5cc |
12.1 |
11.4 |
10.8 |
eag 20506
|
eag B20506
|
416 |
4.070 .030 over |
4.000 stroker |
6.123 I-Beam |
forged
Mahle Flat top -5cc |
12.2 |
11.5 |
10.9 |
eag 20506 30
|
eag B20506 30
|
340 High Performance Competition and Racing
340 Eagle Competition Rotating Assembly
Mopar 340 Stock Stroke and 340 Stroker Kits
Description of specs and parts included in Competition 340 rotating assembly kits
- Stock Specs: 340 standard bore is 4.040, stock stroke is 3.31, stock rod length is 6.123, stock wrist pin size is .984
- CID: Cubic inch displacement of engine
- Bore: Finished cylinder bore size, in inches that pistons are designed to work in
- Crankshaft: Eagle 4340 forged steel, stroke in inches as listed in table
- Connecting Rods: Eagle 4340 H beam, stock length of 6.123 inches with .984 wrist pin
- Piston: Type and displacement of valve reliefs and dish or dome
- Compression: Compression ratio with different head chamber cc sizes
- Notes: Eagle rates this kit for 750-1500 hp
Part numbers with a "B" after eag in the part number indicate that the price for that kit includes balancing before
shipping to you. Part numbers without the B in the part number must be balanced before
installation into your engine. |
|
Compression |
|
CID |
Bore
Size |
Stroke |
Rod |
Piston |
60cc |
65cc |
70cc |
Kit # |
340 |
4.040 stock |
3.310 stock |
6.123 H-Beam |
forged
Mahle Flat top -5cc |
10.2 |
9.6 |
9.1 |
eag 20104
|
eag B20104
|
345 |
4.070 .030 over |
3.310 stock |
6.123 H-Beam |
forged
Mahle FT -5cc |
10.2 |
9.6 |
9.1 |
eag 20104 30
|
eag B20104 30
|
410 |
4.040 stock |
4.000 stroker |
6.123 H-Beam |
forged Mahle inv dome -28cc |
9.5 |
9.1 |
8.8 |
eag 20105
|
eag B20105
|
416 |
4.070 .030 over |
4.000 stroker |
6.123 H-Beam |
forged Mahle inv dome -28cc |
9.6 |
9.2 |
8.9 |
eag 20105 30
|
eag B20105 30
|
410 |
4.040 stock |
4.000 stroker |
6.123 H-Beam |
forged
Mahle Flat top -5cc |
12.1 |
11.4 |
10.8 |
eag 20106
|
eag B20106
|
416 |
4.070 .030 over |
4.000 stroker |
6.123 H-Beam |
forged
Mahle Flat top -5cc |
12.2 |
11.5 |
10.9 |
eag 20106 30
|
eag B20106 30
|
Plymouth Dodge Mopar 360 & 5.9 Magnum Engine Street Strip Kits
360 Street / Strip
Eagle Street / Strip Mopar 360
& 5.9L Magnum Stroker Kits and Stock Stroke Rotating Assembly Kits
Description of specs and parts included in the 5.9 Magnum and 360 street strip rotating assembly kits
- Stock Specs: 360 standard bore is 4.000, stock stroke is 3.58, stock rod length is 6.123, stock wrist pin size is .984
- CID: Cubic inch displacement of engine
- Bore: Finished cylinder bore size, in inches that pistons are designed to work in
- Crankshaft: Eagle cast steel, stroke in inches as listed in table
- Connecting Rods: Eagle 5140 I beam, stock length of 6.123 inches with .984 wrist pin
- Piston: Type and displacement of valve reliefs and dish or dome
- Compression: Compression ratio with different head chamber cc sizes
- Notes: Eagle rates these kits for 500hp and less
Part numbers with a "B" after eag in the part number indicate that the price for that kit includes balancing before
shipping to you. Part numbers without the B in the part number must be balanced before
installation into your engine. |
|
Compression |
|
CID |
Bore
Size |
Stroke |
Rod |
Piston |
60cc |
65cc |
70cc |
Kit # |
365 |
4.030
.030 over |
3.580 stock |
6.123
I-Beam |
forged
Mahle Flat top -5cc |
10.8 |
10.2 |
9.7 |
eag 20507 30
|
eag B20507 30
|
367 |
4.040
.040 over |
3.580 stock |
6.123
I-Beam |
forged
Mahle Flat top -5cc |
10.8 |
10.2 |
9.7 |
eag 20507 40
|
eag B20507 40
|
371 |
4.060
.060 over |
3.580 stock |
6.123
I-Beam |
forged
Mahle Flat top -5cc |
10.9 |
10.3 |
9.8 |
eag 20507 60
|
eag B20507 60
|
408 |
4.030
.030 over |
4.000 stroker |
6.123
I-Beam |
forged Mahle inv dome -28cc |
9.4 |
9.0 |
8.7 |
eag 20508 30
|
eag B20508 30 |
410 |
4.040
.040 over |
4.000 stroker |
6.123
I-Beam |
forged Mahle inv dome -28cc |
9.4 |
9.0 |
8.7 |
eag 20508 40
|
eag B20508 40 |
414 |
4.060
.060 over |
4.000 stroker |
6.123
I-Beam |
forged Mahle inv dome -28cc |
9.5 |
9.1 |
8.8 |
eag 20508 60
|
eag B20508 60 |
408 |
4.030
.030 over |
4.000 stroker |
6.123
I-Beam |
forged
Mahle Flat top -5cc |
12 |
11.3 |
10.7 |
eag 20509 30 |
eag B20509 30
|
410 |
4.040
.040 over |
4.000 stroker |
6.123
I-Beam |
forged
Mahle Flat top -5cc |
12 |
11.3 |
10.7 |
eag 20509 40 |
eag B20509 40
|
414 |
4.060
.060 over |
4.000 stroker |
6.123
I-Beam |
forged
Mahle Flat top -5cc |
12.1 |
11.4 |
10.8 |
eag 20509 60 |
eag B20509 60
|
Mopar Plymouth Dodge 360 & 5.9L Magnum Engine Competition Kits
360 High Performance Competition and Racing
Eagle Competition Rotating Assemblies
Mopar 360 & 5.9L Magnum Stroker Kits and Stock Stroke Rotating Assembly Kits
Description of specs and parts included in Competition Racing 360 rotating assembly kits
- Stock Specs: 360 standard bore is 4.000, stock stroke is 3.580, stock rod length is 6.123, stock wrist pin size is .984
- CID: Cubic inch displacement of engine
- Bore: Finished cylinder bore size, in inches that pistons are designed to work in
- Crankshaft: Eagle 4340 forged steel, stroke in inches as listed in table
- Connecting Rods: Eagle 4340 H beam, stock length of 6.123 inches with .984 wrist pin
- Piston: Type and displacement of valve reliefs and dish or dome
- Compression: Compression ratio with different head chamber cc sizes
- Notes: Eagle rates this kit for 750-1500 hp
Part numbers with a "B" after eag in the part number indicate that the price for that kit includes balancing before
shipping to you. Part numbers without the B in the part number must be balanced before
installation into your engine. |
|
Compression |
|
CID |
Bore
Size |
Stroke |
Rod |
Piston |
60cc |
65cc |
70cc |
Kit # |
365 |
4.030
.030 over |
3.580 stock |
6.123
H-Beam |
forged
Mahle Flat top -5cc |
11.1 |
10.5 |
9.9 |
eag 20107 30
|
eag B20107 30
|
367 |
4.040
.040 over |
3.580 stock |
6.123
H-Beam |
forged
Mahle Flat top -5cc |
11.1 |
10.5 |
9.9 |
eag 20107 40
|
eag B20107 40
|
371 |
4.060
.060 over |
3.580 stock |
6.123
H-Beam |
forged
Mahle Flat top -5cc |
11.2 |
10.6 |
10 |
eag 20107 60
|
eag B20107 60
|
408 |
4.030
.030 over |
4.000 stroker |
6.123
H-Beam |
forged Mahle inv dome -28cc |
9.4 |
9.0 |
8.7 |
eag 20108 30
|
eag B20108 30
|
410 |
4.040
.040 over |
4.000 stroker |
6.123
H-Beam |
forged Mahle inv dome -28cc |
9.4 |
9.0 |
8.7 |
eag 20108 40 |
eag B20108 40 |
414 |
4.060
.060 over |
4.000 stroker |
6.123
H-Beam |
forged Mahle inv dome -28cc |
9.5 |
9.1 |
8.8 |
eag 20108 60 |
eag B20108 60 |
408 |
4.030
.030 over |
4.000 stroker |
6.123
H-Beam |
forged
Mahle Flat top -5cc |
12 |
11.3 |
10.7 |
eag 20109 30
|
eag B20109 30
|
410 |
4.040
.040 over |
4.000 stroker |
6.123
H-Beam |
forged
Mahle Flat top -5cc |
12 |
11.3 |
10.7 |
eag 20109 40 |
eag B20109 40 |
414 |
4.060
.060 over |
4.000 stroker |
6.123
H-Beam |
forged
Mahle Flat top -5cc |
12.1 |
11.4 |
10.8 |
eag 20109 60 |
eag B20109 60 |
We offer many other parts to go along with the 340 , 360 , and 5.9 Magnum rotating
you do not find what you need please contact us for assistance.
Eagle Specialty Products Index