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S&S Stock Bore Stroker Pistons
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for Knucklehead, Panhead and Shovelhead
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63-603

Forged piston by S&S

Item №
63-603
Description
Facts

Pistons for Stroker motors. Each kit includes two pistons for front and rear cylinder, including piston rings, pins and clips. Standard size is for the 3-7/16” bore of 74” (=1200 ccm) cylinders. For 80” (=1340 ccm) cylinders 3-7/16” + .060 would be standard size.

  • for 4-1/2", 4-5/8" and 4-3/4" stroker kits
  • fits Knucklehead, Panhead and Shovelhead
  • aluminum forged
  • Over-/Undersize: +0.030 ”
  • nominal bore: 3-7/16 ”
  • gross weight: 1.3 kg
net price*
$576.47
* United States of America: Tax free shipping. Please check your local import fees.
In stock. Ready for immediate delivery from our Würzburg, Germany warehouse
pair
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Spare parts:

61-893

61-893

Piston ring set by Hastings; fits 1200cc Knucklehead, Panhead, Shovelhead and 1300cc Flathead; cast iron / steel, compression rings with hard chromium faces; Over-/Undersize: +0.030 ”; nominal bore: 3-7/16 ”; compression ring height: 1/16 ”; oil ring height G: 3/16 ”; replaces OEM HD 22329-55B; USA; gross weight: 112 g
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Accessories:

Truett & Osborn Stroker Flywheels for OHV Big Twins

Truett & Osborn Stroker Flywheels for OHV Big Twins

Of all measures to increase horsepower and torque of your factory engine, stroker flywheels are among the most effective. Boost your stock displacement 61” or 74” Knucklehead, Panhead or Shovelhead up to 84 cui or 1380cc (@ 3-7/16” bore) and experience arm stretching performance and a significantly increased fun factor. ...
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