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Chevy Small Block

 

350 - 5.700 Rod - Flat Top - Lightweight
Part #
Stroke
C/H
Bore
Weight
Compression Ratio*
Ring
Set
Purchase Online
58cc
64cc 68cc 76cc
L2256F
$389
3.480
1.563
4.030
4.040
4.060
490
500
510
11.24
11.28
11.37
10.44
10.48
10.56
9.98
10.02
10.09
9.17
9.21
9.28
315-0036

Ring Groove: 1/16 - 1/16 - 3/16
Valve Relief Volume:
2.5cc
Note: L2256F is a special lightweight design for a circle track
- .972 X 2.5 wrist pin with double spiral locks
- Full floating wrist pins.
- Shallow valve reliefs for higher compression.
* Compression ratio computed with .010 deck and .038 head gasket.

 

350 - 5.700 Rod - Flat Top
Part #
Stroke
C/H
Bore
Weight
Ring Set
Compression Ratio*
Purchase Online
58.0cc
64.0cc
68.0cc
76.0cc
P2256F
$329
3.480
1.563
4.000
4.030
4.040
4.060
516
536
541
545
40564
CP
10.90
11.03
11.07
11.16
10.14
10.26
10.30
10.38
9.70
9.81
9.85
9.93
8.93
9.03
9.07
9.14

Ring Groove: 5/64 - 5/64 - 3/16
Valve Relief Volume: 4.0cc
* Compression ratio computed with .010 deck and .038 head gasket.

 

350 - 5.700 Rod - Dish Top
Part #
Stroke
C/H
Bore
Weight
Ring Set
Compression Ratio*
Purchase Online
58.0cc
64.0cc
68.0cc
76.0cc
P2403F
$350
3.480
1.562
4.000
4.030
4.040
4.060
493
514
518
524
40564
CP
9.86
9.98
10.02
10.09
9.25
9.36
9.39
9.47
8.89
8.99
9.03
9.10
8.25
8.35
8.38
8.44

Ring Groove: 5/64 - 5/64 - 3/16
Dish Volume: -12.5cc
* Compression ratio computed with .010 deck and .038 head gasket.

350 - 5.700 Rod - Dish Top
Part #
Stroke
C/H
Bore
Weight
Ring Set
Compression Ratio*
Purchase Online
58.0cc
64.0cc
68.0cc
76.0cc
P2441F
$350
3.480
1.560
4.000
4.030
4.040
4.060
486
498
504
513
40564
CP
9.08
9.19
9.22
9.30
8.57
8.67
8.70
8.77
8.26
8.36
8.39
8.46
7.72
7.81
7.84
7.90

Ring Groove: 5/64 - 5/64 - 3/16
Dish Volume: -20.3cc
* Compression ratio computed with .010 deck and .038 head gasket.

383 - 5.700 Rod - Flat Top
Part #
Stroke
C/H
Bore
Weight
Ring Set
Compression Ratio*
Purchase Online
58.0cc
64.0cc
68.0cc
76.0cc
P3831F
$329
3.750
1.425
4.000
4.030
4.040
4.060
514
528
534
541
40564
CP
11.67
11.81
11.85
11.94
10.85
10.98
11.02
11.11
10.37
10.50
10.54
10.62
9.54
9.66
9.70
9.77

Ring Groove: 5/64 - 5/64 - 3/16
Valve Relief Volume: 4.0cc
Note: P3831F is designed for use with 5.700 length rod and 3.750" stroke.
* Compression ratio computed with .010 deck and .038 head gasket.

 

383 - 5.700 Rod - Dish Top
Part #
Stroke
C/H
Bore
Weight
Ring Set
Compression Ratio*
Purchase Online
58.0cc
64.0cc
68.0cc
76.0cc
P3832F
$389
3.750
1.425
4.000
4.030
4.040
4.060
460
477
490
523
40564
CP
9.54
9.66
9.70
9.77
9.01
9.12
9.16
9.23
8.69
8.80
8.83
8.90
8.13
8.22
8.25
8.32

Ring Groove: 5/64 - 5/64 - 3/16
Dish Volume: -22.0cc
Note: P3832F is designed for use with 5.700 length rod and 3.750" stroke.
* Compression ratio computed with .010 deck and .038 head gasket.

 

Chevy LS1 - 6.098 Rod Flat Top
Part #
Stroke
C/H
Bore
Weight
Ring Set
Compression Ratio*
Purchase Online
59.0cc
64.0cc
66.0cc
76.0cc
3.622
1.340
3.902
376
315-0037
10.87
10.23
10.00
8.98

Ring Grooves: 1.5, 1.5, 3mm
Valve Relief Volume:
3.0cc
* Compression ratio computed with .010 deck and .038 head gasket.

 

FPS Pistons

Probe FPS Forged Pistons are designed for heavy duty (towing, etc) or high performance street car, trucks, marine and some racing application. FPS pistons are far stronger than hypoeutectic or hypereutectic cast pistons. Boost and nitrous oxide are compatible.

  • VMS-75 High Silicon Aluminum
  • Tight piston to wall clearance
  • Reinforce piston skirts (eliminated collapsed piston skirts)
  • Increased valve clearance
  • Reduced piston weight
  • Offset wrist pins
  • Press fit piston pins

Anatomy Of A Better Piston

Anti-Setonation Grooves Reduces detonation by tempering pressure spikes, enhances piston life!
Pressure Equalization Channel Enhance ring eal, producing more power and enhancing fuel economy!
Slotted Drain Back Holes Slotted drain back holes prevent oil from collecting in the oil ring groove.
CNC Diamond Pinhole Finish Produces ultra straight pinholes and outstanding microfinish for extended life and durability.
Slotted Pin Oiling Slotted pin oiling enhances wrist pin and pin holes oiling for durability and long life.
CNC Diamond Skirt Finishing Retains oil on the piston skirt providing superior anti scuffing capability! Also reduces piston noise!
Ultra-Tight Running Clearance Increases piston and piston ring life and reduces blowby!
Precision Forged of Aircraft Alloy Aluminum Our forgings are approximately 75% stronger than hypoeutectic or hypereutectic castings!
Fully CNC Machined Domes and valve reliefs are fully CNC machined for consistency and precise clearance to valves and combustion chambers.

 
Call 1-877-354-3812
to order your Parts Today!

Contact us Via Email

About RPM Machine | Specials | Newsletter
RPM Machine-Performance Auto Parts
146 Ea 13065 So Suite F
Draper Utah 84020
We carry parts from scat, je, wiseco, ross, crower, callies, eagle, cat, eagle
Most of our rotating assemblies include forged pistons
and 4340 steelcranks


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