Home e-mail Probe Products Product Specifications About Probe Dealer Information
Flat Tops Dished Tops Universal Dome Tops Twisted Wedge Dome Tops

Flat Top

SRS Forged Pistons
for Ford 302 (5.0L)

  • 2618-t6 forged aluminum

  • Lightweight

  • Tight running clearance (.002 to .006)

  • Weight matched (+/- 2.5 grams)

  • Finished diameters +/- .00005

  • Fits standard AND Twisted Wedge heads
Our Tool Steel Wrist Pin Upgrade Is Now
Available At A Substantially Reduced Cost!

Back To:
 PROBE FORGED PISTONS
Compression Ratio computed with .010 deck and .038 head gasket at bore +.125" (weights and compression ratios are approximate)
    Compression Ratio      
Bore Weight 58cc 61cc 64cc 68cc Part # Ring Set  

302 - 3.000 Stroke - 5.090 Rod - 1.600 C/H - .912 x 2.500 - 113 Gram Pin
4.000 508 9.54 9.20 8.88 8.50 10682-Std 315-0036 Ring Grooves 1/16 1/16 3/16
4.030 510 9.65 9.30 8.98 8.60 10682-030   Valve Relief Volume 4.0cc
4.040 520 9.68 9.34 9.02 8.63 10682-040    
4.060 524 9.76 9.41 9.09 8.71 10682-060    

331 - 3.250 Stroke - 5.400 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin
4.000 470 10.25 9.88 9.54 9.12 10666-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 472 10.37 9.99 9.65 9.23 10666-030   Valve Relief Volume 4.0cc
4.040 474 10.41 10.03 9.69 9.27 10666-040    

331 - 3.250 Stroke - 5.400 Rod - 1.175 C/H - .927 x 2.500 - 113 Gram Pin
4.000 470 10.05 9.69 9.36 8.96 12347-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 472 10.16 9.81 9.47 9.07 12347-030   Valve Relief Volume 4.0cc
4.040 474 10.20 9.84 9.51 9.10 12347-040    

347 - 3.250 Stroke - 5.400 Rod - 1.090 C/H - .927 x 2.500 - 113 Gram Pin
4.125 TBA 10.75 10.36 10.01 9.57 14713-Std CR1002 Ring Grooves 1/16 1/16 3mm
4.155 TBA 10.87 10.48 10.12 9.68 14713-030   Valve Relief Volume 4.0cc

347 - 3.400 Stroke - 5.315 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin
4.000 472 10.67 10.29 9.93 9.50 10666-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 474 10.80 10.41 10.05 9.61 10666-030   Valve Relief Volume 4.0cc
4.040 476 10.84 10.45 10.09 9.65 10666-040    

347 - 3.400 Stroke - 5.315 Rod - 1.175 C/H - .927 x 2.500 - 113 Gram Pin
4.000 472 10.67 10.29 9.93 9.50 12347-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 474 10.80 10.41 10.05 9.61 12347-030   Valve Relief Volume 4.0cc
4.040 476 10.84 10.45 10.09 9.65 12347-040    

347 - 3.400 Stroke - 5.315 Rod - 1.090 C/H - .927 x 2.500 - 113 Gram Pin
4.125 TBA 11.20 10.79 10.42 9.97 14713-Std CR1002 Ring Grooves 1/16 1/16 3mm
4.155 TBA 11.32 10.92 10.54 10.08 14713-030   Valve Relief Volume 4.0cc

347 - 3.400 Stroke - 5.400 Rod - 1.090 C/H - .912 x 2.500 - 113 Gram Pin
4.000 472 10.67 10.29 9.93 9.50 10660-Std 315-0036 Ring Grooves 1/16 1/16 3/16
4.030 474 10.80 10.41 10.05 9.61 10660-030   Valve Relief Volume 4.0cc
4.040 476 10.84 10.45 10.09 9.65 10660-040    

347 - 3.400 Stroke - 5.400 Rod - 1.090 C/H - .927 x 2.500 - 113 Gram Pin
4.000 472 10.67 10.29 9.93 9.50 12348-Std 315-0036 Ring Grooves 1/16 1/16 3/16
4.030 474 10.80 10.41 10.05 9.61 12348-030   Valve Relief Volume 4.0cc
4.040 476 10.84 10.45 10.09 9.65 12348-040    

363 - 3.400 Stroke - 5.400 Rod - 1.090 C/H - .912 x 2.500 - 113 Gram Pin (will not fit Twisted Wedge Heads)
4.125 TBA 11.20 10.79 10.42 9.97 14713-Std CR1002 Ring Grooves 1/16 1/16 3mm
4.155 TBA 11.32 10.92 10.54 10.08 14713-030   Valve Relief Volume 4.0cc
Back To:
 PROBE FORGED PISTONS
 

Flat Top
SRS Forged Pistons
for Ford 347C

  • 2618-t6 forged aluminum

  • Lightweight

  • Tight running clearance (.002 to .006)

  • Weight matched (+/- 2.5 grams)

  • Finished diameters +/- .00005

  • Fits most Cleveland heads

 

Our Tool Steel Wrist Pin Upgrade Is Now
Available At  A Substantially Reduced Cost!

Back To:
 PROBE FORGED PISTONS
Compression Ratio computed with .010 deck and .038 head gasket at bore +.125" (weights and compression ratios are approximate)
    Compression Ratio      
Bore Weight 58cc 61cc 64cc 68cc Part # Ring Set  

302 - 3.400 Stroke - 5.315 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin
4.000 TBA 11.08 10.29 9.82 9.03 14758-Std 315-0036 Ring Grooves 1/16 1/16 3.0mm
                Valve Relief Volume 2.0cc


 

Reverse Dome

SRS Forged Pistons
for

Ford 302 (5.0L) - 347

  • 2618-t6 forged aluminum

  • Lightweight

  • Tight running clearance (.002 to .006)

  • Weight matched (+/- 2.5 grams)

  • Finished diameters +/- .00005

  • Fits standard AND Twisted Wedge heads


Our Tool Steel Wrist Pin Upgrade Is Now
Available At  A Substantially Reduced Cost!

Back To:
 PROBE FORGED PISTONS
Compression Ratio computed with .010 deck and .038 head gasket at bore +.125" (weights and compression ratios are approximate)
    Compression Ratio      
Bore Weight 58cc 61cc 64cc 68cc Part # Ring Set  

302 - 3.000 Stroke - 5.090 Rod - 1.600 C/H - .912 x 2.500 - 113 Gram Pin
4.000 471 8.41 8.15 7.91 7.62 10684-Std 315-0036 Ring Grooves 1/16 1/16 3/16
4.030 487 8.51 8.25 8.00 7.70 10684-030   Dish Volume 15.0cc
4.040 516 8.54 8.28 8.03 7.73 10684-040    
4.060 534 8.61 8.34 8.10 7.79 10684-060    

331 - 3.250 Stroke - 5.400 Rod - 1.175 C/H - .927 x 2.500 - 117 Gram Pin
4.000 390 8.56 8.32 8.08 7.80 12350-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 392 8.66 8.41 8.18 7.89 12350-030   Dish Volume 20.1cc
4.040 394 8.70 8.45 8.21 7.92 12350-040    

331 - 3.250 Stroke - 5.400 Rod - 1.175 C/H - .927 x 2.500 - 117 Gram Pin
4.000 449 9.10 8.82 8.56 8.23 12352-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 451 9.21 8.92 8.66 8.33 12352-030   Dish Volume 14.2cc
4.040 453 9.25 8.96 8.69 8.36 12352-040    

331 - 3.250 Stroke - 5.400 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin
4.000 384 8.56 8.32 8.08 7.80 11938-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 386 8.66 8.41 8.18 7.89 11938-030   Dish Volume 20.1cc
4.040 388 8.70 8.45 8.21 7.92 11938-040    

331 - 3.250 Stroke - 5.400 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin
4.000 449 9.10 8.82 8.56 8.23 10668-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 451 9.21 8.92 8.66 8.33 10668-030   Dish Volume 14.2cc
4.040 453 9.25 8.96 8.69 8.36 10668-040    

347 - 3.250 Stroke - 5.400 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin (will not fit Twisted Wedge Heads)
4.125 TBA 8.94 8.68 8.44 8.14 14715-Std CR1002 Ring Grooves 1/16 1/16 3mm
4.155 TBA 9.04 8.78 8.54 8.24 14715-030   Dish Volume 20.6cc

347 - 3.400 Stroke - 5.315 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin
4.000 384 8.59 8.34 8.11 7.82 11938-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 386 8.69 8.44 8.21 7.92 11938-030   Dish Volume 20.1cc
4.040 388 8.73 8.48 8.24 7.95 11938-040    

347 - 3.400 Stroke - 5.315 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin
4.000 449 8.91 8.65 8.41 8.11 10668-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 451 9.02 8.76 8.51 8.21 10668-030   Dish Volume 14.2cc
4.040 453 9.05 8.79 8.54 8.24 10668-040    

347 - 3.400 Stroke - 5.315 Rod - 1.175 C/H - .927 x 2.500 - 113 Gram Pin
4.000 384 8.91 8.65 841 8.11 12350-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 386 9.02 8.76 8.51 8.21 12350-030   Dish Volume 20.1cc
4.040 388 9.05 8.79 8.54 8.24 12350-040    

347 - 3.400 Stroke - 5.315 Rod - 1.175 C/H - .927 x 2.500 - 113 Gram Pin
4.000 449 9.19 8.91 8.64 8.32 12352-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 451 9.30 9.01 8.75 8.42 12352-030   Dish Volume 14.2cc
4.040 453 9.34 9.05 8.78 8.45 12352-040    

363 - 3.400 Stroke - 5.315 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin (will not fit Twisted Wedge Heads)
4.125 TBA 9.48 9.20 8.94 8.61 14715-Std CR1002 Ring Grooves 1/16 1/16 3mm
4.155 TBA 9.59 9.30 9.04 8.71 14715-030   Dish Volume 18.8cc

347 - 3.400 Stroke - 5.400 Rod - 1.090 C/H - .927 x 2.500 - 113 Gram Pin
4.000 384 9.52 9.22 8.94 8.60 12354-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 386 9.63 9.33 9.05 8.70 12354-030   Dish Volume 13.8cc
4.040 388 9.67 936 9.08 8.73 12354-040    

347 - 3.400 Stroke - 5.400 Rod - 1.090 C/H - .912 x 2.500 - 113 Gram Pin
4.000 393 9.52 9.22 8.94 8.60 10662-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 395 9.63 9.33 9.05 8.70 10662-030   Dish Volume 13.8cc
4.040 397 9.67 9.36 9.08 8.73 10662-040    

363 - 3.400 Stroke - 5.400 Rod - 1.090 C/H - .912 x 2.500 - 113 Gram Pin (will not fit Twisted Wedge Heads)
4.125 TBA 9.48 9.20 8.94 8.61 14715-Std CR1002 Ring Grooves 1/16 1/16 3mm
4.155 TBA 9.59 9.30 9.04 8.71 14715-030   Dish Volume 18.8cc
Back To:
 PROBE FORGED PISTONS

 

Universal Domed Top

SRS Forged Pistons
for Ford 302 - 347

  • 2618-t6 forged aluminum

  • Lightweight

  • Tight running clearance (.002 to .006)

  • Weight matched (+/- 2.5 grams)

  • Finished diameters +/- .00005

  • Fits most standard heads
Our Tool Steel Wrist Pin Upgrade Is Now
Available At  A Substantially Reduced Cost!

Back To:
 PROBE FORGED PISTONS
Compression Ratio computed with .010 deck and .038 head gasket at bore +.125" (weights and compression ratios are approximate)
    Compression Ratio      
Bore Weight 58cc 61cc 64cc 68cc Part # Ring Set  

302 - 3.000 Stroke - 5.090 Rod - 1.600 C/H - .912 x 2.500 - 113 Gram Pin
4.000 480 11.23 10.75 10.31 9.78 10466-Std 315-0036 Ring Grooves 1/16 1/16 3/16
4.030 485 11.36 10.87 10.42 9.89 10466-030   Dome Volume 8.0cc
4.040 490 11.40 10.91 10.46 9.93 10466-040    

331 - 3.250 Stroke - 5.400 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin
4.000 454 12.27 11.73 11.24 10.65 14112-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 456 12.41 11.86 11.37 10.77 14112-030   Dome Volume 9.0cc
4.040 458 12.46 11.91 11.41 10.81 14112-040    

347 - 3.400 Stroke - 5.315 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin
4.000 454 12.79 12.22 11.71 11.09 14112-Std 315-0036 Ring Grooves 1/16 1/16 3/16
4.030 456 12.94 12.36 11.84 11.22 14112-030   Dome Volume 9.0cc
4.040 458 12.99 12.41 11.89 11.26 14112-040    

347 - 3.400 Stroke - 5.400 Rod - 1.090 C/H - .927 x 2.500 - 117 Gram Pin
4.000 449 12.79 12.22 11.71 11.09 10480-Std 315-0036 Ring Grooves 1/16 1/16 3/16
4.030 451 12.94 12.36 11.84 11.22 10480-030   Dome Volume 9.0cc
4.040 453 12.99 12.41 11.89 11.26 10480-040    
Back To:
 PROBE FORGED PISTONS

 

Twisted Wedge Dome Top

SRS Forged Pistons
for

Ford 302 (5.0L) - 347

  • 2618-t6 forged aluminum

  • Lightweight

  • Tight running clearance (.002 to .006)

  • Weight matched (+/- 2.5 grams)

  • Finished diameters +/- .00005

  • Fits Twisted Wedge and Twisted Wedge "R"
Our Tool Steel Wrist Pin Upgrade Is Now Available
At  A Substantially Reduced Cost!
Back To:
 PROBE FORGED PISTONS
Compression Ratio computed with .010 deck and .038 head gasket at bore +.125" (weights and compression ratios are approximate)
    Compression Ratio      
Bore Weight 58cc 61cc 64cc 68cc Part # Ring Set  

302 - 3.000 Stroke - 5.090 Rod - 1.600 C/H - .912 x 2.500 - 113 Gram Pin
4.000 490 11.23 10.75 10.31 9.78 10471-Std 315-0036 Ring Grooves 1/16 1/16 3/16
4.030 492 11.36 10.87 10.42 9.89 10471-030   Dome Volume 8.0cc
4.040 494 11.40 10.91 10.46 9.93 10471-040    

331 - 3.250 Stroke - 5.400 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin
4.000 452 12.27 11.73 11.24 10.65 14111-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 454 12.41 11.86 11.37 10.77 14111-030   Dome Volume 9.0cc
4.040 458 12.46 11.91 11.41 10.81 14111-040    

347 - 3.400 Stroke - 5.315 Rod - 1.175 C/H - .912 x 2.500 - 113 Gram Pin
4.000 452 12.79 12.22 11.71 11.09 14111-Std 315-0036 Ring Grooves 1/16 1/16 3/16
4.030 454 12.94 12.36 11.84 11.22 14111-030   Dome Volume 9.0cc
4.040 458 12.99 12.41 11.89 11.26 14111-040    

347 - 3.400 Stroke - 5.400 Rod - 1.090 C/H - .927 x 2.500 - 117 Gram Pin
4.000 448 12.79 12.22 11.71 11.09 10485-Std 315-0049 Ring Grooves 1/16 1/16 3mm
4.030 450 12.94 12.36 11.84 11.22 10485-030   Dome Volume 9.0cc
4.040 452 12.99 12.41 11.89 11.26 10485-040    
Back To:
 PROBE FORGED PISTONS