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Chevy 350 & 383 Ultralight
Flat Top

 

350 - 6.000 Rod - Flat Top
Part #
Stroke
C/H
Bore
Weight
Compression Ratio*
Ring
Set
Purchase Online
58cc
64cc 68cc 76cc
10445
$572
3.480
1.260
4.000
4.030
4.040
4.060
331
335
337
341
11.48
11.61
11.66
11.75
10.63
10.76
10.80
10.88
10.14
10.26
10.30
10.38
9.30
9.41
9.44
9.52
315-0015

Ring Groove: .043, .043, 3mm
Valve Relief Volume:
0.0 cc
Note: These pistons come with no valve reliefs.
* Compression ratio computed with .010 deck and .038 head gasket.

 

350 - 6.125 Rod - Flat Top
Part #
Stroke
C/H
Bore
Weight
Compression Ratio*
Ring Set
Purchase Online
58cc
64cc 68cc 76cc
10450
$572
3.480

1.125

4.000
4.030
4.040
4.060
325
329
331
335
11.48
11.61
11.66
11.75
10.63
10.76
10.80
10.88
10.14
10.26
10.30
10.38
9.30
9.41
9.44
9.52
315-0015

Ring Groove: .043, .043, 3mm
Valve Relief Volume: 0.0 cc
Note: These pistons come with no valve reliefs.
* Compression ratio computed with .010 deck and .038 head gasket.

 

350 - 6.250 Rod - Flat Top
Part #
Stroke
C/H
Bore
Weight
Compression Ratio*
Ring Set
Purchase Online
58cc
64cc 68cc 76cc
10457
$614
3.480

1.000

4.000
4.030
4.040
4.060
316
320
322
326
11.48
11.61
11.66
11.75
10.63
10.76
10.80
10.88
10.14
10.26
10.30
10.38
9.30
9.41
9.44
9.52
315-0015

Ring Groove: .043, .043, 3mm
Valve Relief Volume: 0.0 cc
Note: These pistons come with no valve reliefs.
* Compression ratio computed with .010 deck and .038 head gasket.

 

383 - 6.000 Rod - Flat Top
Part #
Stroke
C/H
Bore
Weight
Compression Ratio*
Ring Set
Purchase Online
58cc
64cc 68cc 76cc
10450
$572
3.750

1.125

4.000
4.030
4.040
4.060

325
329
331
335

12.29
12.44
12.49
12.58
11.38
11.52
11.56
11.65
10.85
10.98
11.02
11.11
9.94
10.06
10.10
1018
315-0015

Ring Groove: .043, .043, 3mm
Valve Relief Volume: 0.0 cc
Note: These pistons come with no valve reliefs.
* Compression ratio computed with .010 deck and .038 head gasket.

 

383 - 6.125 Rod - Flat Top
Part #
Stroke
C/H
Bore
Weight
Compression Ratio*
Ring Set
Purchase Online
58cc
64cc 68cc 76cc
10457
$614
3.750

1.000

4.000
4.030
4.040
4.060
316
320
322
326
12.29
12.44
12.49
12.58
11.38
11.52
11.56
11.65
10.85
10.98
11.02
11.11
9.94
10.06
10.10
1018
315-0015

Ring Groove: .043, .043, 3mm
Valve Relief Volume: 0.0 cc
Note: These pistons come with no valve reliefs.
* Compression ratio computed with .010 deck and .038 head gasket.

 

PRS Series Pistons

Probe PRS Forged Pistons are specifically designed for racing application. Now available for the Chevrolet 350 and Ford 2300, Probe PRS pistons are designed to be the lightest pistons available anywhere. In addition to the ultralight weight Probe PRS forged pistons are designed to radically reduce drag and enhance ring seal to increase power.

* 2618-t6 Forged Aluminum
* Ultra light piston designs
* Ultralight wrist pins
* Full floating wrist pins
* Lateral gas ports (some models)
* .043" top and second rings (some models)
* "Frictionless" skirt designs
* Narrow ring lands

  • 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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