Price: $520

This item has been shown 0 times.


PRB 13729

American Made

Big Block Chevy 489/496 DomeTop +18.0cc 6.385" Rod - SRS Race Piston Set
Part Number: 13729

Full Set of 8 Pistons, Pins and Locks.

1.270" Compression Height
4.250" Stroke
6.385" Rod Length
0.990" Pin OD
1/16in.1/16 in.3/16 in. Rings
Available Bore Sizes:4.280", 4.310", 4.320", 4.350", 4.375"(Your Choice, must include oversize with payment info)


SRS Probe SRS forged pistons are designed for high performance street and most racing applications. SRS pistons are available in a wide variety of designs, tuned to achieve the highest performance possible. Any combination from ultralight 2bbl oval track to high performance street, to heavily boosted race only cars will find Probe SRS Forged Pistons to be the perfect piston.

PROBE Industries Forged Pistons - The Fastest, Most Powerful Pistons For the Money! Since 1987 Probe Industries has manufactured a wide variety of products ranging from lightweight billet rockers to forged pistons. Probe Industries is continually striving for excellence in offering a large selection of products to racers and automotive enthusiasts. Today, Probe forged pistons are a result of many years of technological advances in both forging and machine tool technology.

May be used with boost and nitrous oxide.

  • 2618-T61 Forged Aluminum
  • Lightweight Wrist Pins
  • Lightweight Piston Design
  • Full Floating Wrist Pins
  • Tight Running Clearances
  • Narrow Piston Rings
  • Low Drag Skirt Design
  • Large Variety of Compression Ratios
  • Design Specific Valve Reliefs

Estimated Compression Ratios:

Part Number Cylinder Head Volume 106.0cc 112.0cc 118.0cc 124.0cc BBC 489 STROKER 13729-030 11.04 10.47 9.96 9.50 13729-060 11.16 10.58 10.07 9.62 13729-070 11.20 10.62 10.11 9.65 13729-100 11.33 10.74 10.22 9.75 13729-125 11.43 10.84 10.32 9.85

Do I need forged pistons?
Forged pistons may not be absolutely necessary in all applications. However, the minor additional cost of a forged piston can save your motor from disaster in a mirginal situation. What is the difference between the Probe FPS and the Probe SRS series of forged pistons?
Probe FPS Forged Pistons are designed for heavy duty and high performance use when the application requires a piston that is stronger than a Cast or Hypereutectic Cast Piston. They are suitable for heavy duty, high performance street and some race applications. Compression ratios are similar to factory applications and weights are generally lighter than the TRW equivalent. The FPS series is manufactured using the same ultra-modern machining techniques as the SRS and series pistons. Can Probe pistons take NOS and/or boost?
Now there’s a loaded question! Standard weight Probe FPS and SRS Series are manufactured with sufficient deck thickness to handle even large nitrous systems. The ring lands are moved down to provide additional strength in that area. Having said that, NOTHING can protect a piston from a nitrous lean-out. As the minimum thickness is .200” in the standard weight pistons, they are normally used in the 15 to 18 lbs. boostrange with no problems, though the same caveat applies for a lean-out. How much horsepower can Probe pistons handle?
There really is no limit. Probe forged pistons (SRS Series) are machined on 2618-t6 blanks and can handle as much horsepower as any piston made by anyone. The truth is, it’s all about the tune-up. If the mixture and timing are correct you’ll never have a problem. If they are not, that’s when you run into problems no matter who’s pistons you are ruining (we mean running). How much RPM can Probe Forged Pistons handle? There is no practical limit for RPM. In general, the higher the RPM the lighter the piston should be (33 ounces at 10,000 rpm is 20 TONS). For the SRS Series pistons 8,500 rpm is common. What are the benefits of a lightweight piston? Light pistons have several benefits. They reduce stress on the rotating assembly and block, especially at high rpm. They allow quicker wind up of the engine, much the same as a lightweight flywheel would. They make balancing easier, reducing or eliminating the need for expensive Mallory metal.

We do accept Paypal and U.S. based credit cards (Visa/MC/Discover). Please make payment within 7 days of sale end.You can call us at (515)733-2890 for credit card payments or questions.



Paypal Users Please READ


In order to comply with Paypal's protection policy, any Paypal payment totaling $250 or more must be sent with signature confirmation on delivery. This totalapplies toitem price plus the shipping amount and also applies to all packages. If your order is sent in multiple boxes you will need to sign for each one.

Domestic Customers Within the Lower 48 States:

  • Paypal payments of $0-$249.99:no signature required
  • Paypal payments of $250+: signature required (on all boxes if multiples)

  • Paypal payments of $0-$249.99: USPS Priority International, no signature required
  • Paypal payments of $250+: Shipping will be viaUPS or Fedexonly.Shippingcan be expensive so please emailfor a shipping qoute before offerding for services available as the shipping amount may raise the total over the $250.
  • Shipping:

    We do not ship toPO Boxes

    • Within the lower 48 states:
      The listed fixed price shipping is to the lower 48 states only. All others will be additional.

    We are happy tocombine shipping on sales when possible.Normally it will be the highest shipping amount plus half the shipping amount on other items, sometimes better on orders of small items. Some items are not combined due to size or weight such as crankshafts, torque converters, radiators, cylinder heads, etc. On multiple item purchases the shipping amount is not figured automatically during checkout so please request a new invoice or wait for us to send a combined invoice so we can adjust the total.

    We do have sales that state free shipping when purchased withcertain items such as grommet kits with valve covers, pickup tubes with oil pans, etc.If purchasingitems withfree shipping, please request a new invoice before paying.The shipping amount is not figured automatically during checkout. We are unable torefund your Paypalonce payment has been sent.If you have any doubt what your shipping will be please feel free to call us at 515-733-2890 during business hours.

    • International:
      We use USPS Priority when possible (please see above note) which has the best combination of price, deliverytime, and reliability. We strongly encourage you toemail for a s/h quote before offerding to areas outside the lower 48 states. Please include your postal code so we can determine the shipping. Paypal payments $250 and above will ship only by UPS/FedEx and require a signature on delivery.

    Shipping based on weight and number of packages.We dotry to combineas many items into one box as we can.

    Shipping amount is not figured automatically during checkout. Please request updated invoice after offerding. Some countrieshave size limit requirements thataffect certain largeitems such as radiators and can not be shipped normal USPS Priority. All items will be declared as actual value, we do not mark as "gift" or at a reduced value! Shipping costs are not figured into the actual value.

    • Canada orders:
      UPS now has a special discounted program for shipping to Canada with us, please call or email to find out more!



    Dollar sales!

    Good luck and happy offerding.Make sure you check out my store and numerous $1 sales that feature both new and used items.Keep an eye out - you never know what kind of deals you'll find!

    If you have any questions please email or call us at (515)733-2890.

    Parts Search: