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Harley Twin Cam Piston Kits CP Pistons Standard Bore and Big Bore Twin Cam Pistons

CP Pistons Harley Davidson Twin Cam Piston Logo

Harley CP Pistons, the best pistons for those that demand the ultimate in engine performance!

Harley Davidson Twin Cam pistons for street high performance and racing forged piston kits by CP pistons available here. We have standard bore twin cam pistons as well as big bore twin cam piston kits.CP Pistons Harley twin cam high compression piston kits are also available in several different compression ratios. These forged pistons will work with oversize valves as well as high lift camshafts as they include oversize valve reliefs. Along with the full radius dome designs, high performance piston rings and high strength piston pins, these pistons offer the highest quality and are engineered for maximum power output and dependability. Buy the best forged Harley Twin Cam pistons, buy CP Pistons forged Harley performance pistons. What is included and features of CP Pistons Twin Cam Piston Kits.

CP Harley Davidson Twin Cam Piston Picture

CP Pistons high performance and racing pistons are used by top professional riders and teams, weekend warriors and street performance enthusiast.

Harley Davidson Twin Cam Piston Kits

Kit Contents
Standard Features included in Harley Twin Cam CP Piston Kits:
1 each Piston
Double forced pin oilers
Fully CNC machined
1 each Piston Pin and locks
Accumulator groove
Pin lock removal grooves
1 each Piston Rings (set for 1 piston)
Anti detonation grooves
Balanced to + or - 1 gram

Please note: You will need to order a quantity of 2 of the part number piston you select to replace both of your existing pistons with these CP Pistons unless you are just doing a replacement of 1 cylinders existing CP Piston. Each part number listed is for 1 piston, 1 piston pin, 1 cylinders worth of piston rings and 1 set of pin locks.

CP Pistons Harley Davidson Twin Cam 88 Cubic Inch Piston Kits

  • Stock Standard Bore size is 3.750 inches
  • Stock Stroke is 4.000 inches
  • Available in 9.75-1 and 10.75-1 compression

Cometic top end gasket sets are available separately, but are not included with the piston kit. The matching head gasket or complete top end gasket kit for each application is listed in the table.

Bore Size Stroke C/H Comp. Dome Volume Installation Notes Part #
3.750 std 4.000 1.270 9.75-1 9.9cc deglaze cylinder

cp m5011


Add To Cart
3.760 +.010 over 4.000 1.270 9.75-1 9.3cc bore and hone cylinder

cp m5012


Add To Cart
3.780 +.030 over 4.000 1.270 9.75-1 8.6cc bore and hone cylinder

cp m5013


Add To Cart
3.750 std 4.000 1.270 10.75-1 18.9cc deglaze cylinder

cp m5014


Add To Cart
3.760 +.010 over 4.000 1.270 10.75-1 18.3cc bore and hone cylinder

cp m5015


Add To Cart
3.780 +.030 over 4.000 1.270 10.75-1 17.8cc bore and hone cylinder

cp m5016


Add To Cart

CP Pistons brand Harley Twin Cam 95 Cubic Inch Piston Kits Twin Cam Models

  • Basic bore size is 3.875 inches for 95 cubic inch displacement
  • Stock stroke is 4.000 inches
  • Available in 9.25-1 , 9.75-1 , 10.25-1 and 11-1 compression ratios
  • FT = Flat Top
Bore Size Stroke C/H Comp. Dome Volume cc's Installation Notes Part #
3.875 4.000 1.270 9.25-1 FT -1.6 deglaze cylinder

cp bhm5070


Add To Cart
3.875 4.000 1.270 9.75-1 4.6 deglaze cylinder

cp bhm5017


Add To Cart
3.880 4.000 1.270 9.75-1 4.6 bore and hone cylinder

cp m5018


Add To Cart
3.885 4.000 1.270 9.75-1 4.6 bore and hone cylinder

cp m5019


Add To Cart
3.875 4.000 1.270 10.25-1 9.7 bore and hone cylinder

cp bhm5061


Add To Cart
3.880 4.000 1.270 10.25-1 9.4 bore and hone cylinder

cp m5062


Add To Cart
3.885 4.000 1.270 10.25-1 9 bore and hone cylinder

cp m5063


Add To Cart
3.875 4.000 1.270 11-1 14.5 bore and hone cylinder

cp bhm5020


Add To Cart
3.880 4.000 1.270 11-1 14.5 bore and hone cylinder

cp m5021


Add To Cart
3.885 4.000 1.270 11-1 14.5 bore and hone cylinder

cp m5022


Add To Cart

Harley Twin Cam 98 Cubic Inch Piston Kits

  • Basic bore size is 3.937 inches for 98 cubic inch displacement
  • Stock stroke is 4.000 inches
  • Available in 9.5-1 , 10-1 , 10.25-1 and 10.75-1 compression ratios
  • FT = Flat Top
Bore Size Stroke C/H Comp. Dome Volume cc's Installation Notes Part #
3.937 4.000 1.265 9.5-1 FT -1.6 deglaze cylinder

cp bhm98ft


Add To Cart
3.937 4.000 1.265 10-1 3 deglaze cylinder

cp bhm98-3


Add To Cart
3.937 4.000 1.265 10.25-1 6 deglaze cylinder

cp bhm98-6


Add To Cart
3.937 4.000 1.265 10.75-1 10 deglaze cylinder

cp bhm98-10


Add To Cart

Harley Twin Cam 103 Cubic Inch Piston Kits

  • Basic bore size is 3.875 inches for 103 cubic inch displacement
  • Stock stroke is 4.375 inches
  • Available in 10-1 and 10.25-1 compression ratios
  • FT = Flat Top
Bore Size Stroke C/H Comp. Dome Volume cc's Installation Notes Part #
3.875 4.375 1.092 10-1 FT -1.6 bore and hone cylinder, use 4.375 stroke crank

cp bhm5064


Add To Cart
3.875 4.375 1.092 10.25-1 1.4 bore and hone cylinder, use 4.375 stroke crank

cp m5023


Add To Cart
3.880 4.375 1.092 10.25-1 1.4 bore and hone cylinder, use 4.375 stroke crank

cp m5024


Add To Cart
3.885 4.375 1.092 10.25-1 1.4 bore and hone cylinder, use 4.375 stroke crank

cp m5025


Add To Cart

CP Harley Twin Cam 96 Cubic Inch Piston Kits for 2007 and newer

  • Basic bore size is 3.750 inches
  • Stock stroke is 4.375 inches
  • Available in 10-1 compression ratio
  • 2007 and newer model engines
3.760 4.375 1.083 10-1 8 bore and hone cylinder

never put into production

CP Harley Twin Cam 103 Cubic Inch Piston Kits for 2007 and newer

  • Basic bore size is 3.875 inches
  • Stock stroke is 4.375 inches
  • Available in 10-1, 10.75-1 and 11.25-1 compression ratios
  • 2007 and newer model engines
Bore Size Stroke C/H Comp. Dome Volume cc's Installation Notes Part #
3.875 4.375 1.085 10-1 FT -1.6 deglaze cylinder

cp bhm5065


Add To Cart
3.875 4.375 1.085 10.75-1 5.5 deglaze cylinder

cp bhm5080


Add To Cart
3.885 4.375 1.083 10.75-1 5.5 bore and hone cylinder

cp m5082


Add To Cart
3.875 4.375 1.085 11.25-1 10.5 deglaze cylinder

cp bhm5083


Add To Cart
3.885 4.375 1.083 11.25-1 10.5 bore and hone cylinder

cp m5085


Add To Cart

CP Harley Twin Cam 107 Cubic Inch Piston Kits for 2007 and newer

  • Basic bore size is 3.937 inches
  • Stock stroke is 4.375 inches
  • Available in 10.25-1, 10.75-1 and 11-1 compression ratios
  • 2007 and newer model engines
Bore Size Stroke C/H Comp. Dome Volume cc's Installation Notes Part #
3.937 4.375 1.085 10.25-1 FT -1.5 deglaze cylinder

cp bhm107FT


Add To Cart
3.937 4.375 1.085 10.75-1 3 deglaze cylinder

cp bhm107-3


Add To Cart
3.937 4.375 1.085 11-1 6 deglaze cylinder

cp bhm107-6


Add To Cart
4.125 4.000 1.270 10.75-1 3.74

big bore, short stroke

deglaze cylinder

cp bhm107-4000

Discontinued by manufacturer, only available as custom order

CP Harley Twin Cam 110 Cubic Inch Piston Kits for 2007 and newer

  • Basic bore size is 4.010 inches
  • Stock stroke is 4.375 inches
  • 2007 and newer model engines
  • Use with Screamin Eagle cylinder head
Bore Size Stroke C/H Comp. Dome Volume cc's Installation Notes Part #
4.010 4.375 1.085 9.25-1 FT -2 deglaze cylinder, use with Screamin Eagle head

cp bhm5102


Add To Cart

Twin Cam 113 Cubic Inch Piston Kit

Bore Size Stroke C/H Comp. Dome Volume cc's Installation Notes Part #
4.060 4.375 1.092 10.75-1 10.4 deglaze cylinder, use with Screamin Eagle head

BHM113SE


Add To Cart

Twin Cam 117 Cubic Inch Piston Kit

4.125 4.375 1.085 10.75-1 -3.28  

BHM117FT


Add To Cart

Twin Cam 124 Cubic Inch Piston Kit

4.125 4.625 0.960 10.75-1 -3.3 Special order part, will take approximately 2 weeks to be built from the time we receive your order.

BHM124-4625


Add To Cart

Milwaukee 8 124 Cubic Inch Piston Kit

4.250 4.375 1.143 11-1   For Milwaukee Eight engine 86.5cc cylinder head

BHM8124-4


Add To Cart

Installation Notes:

  • Deglaze Cylinder When replacing a piston with the same stock bore size as the original factory stock size you do not need to have your cylinder modified. We do recommend that you deglaze the cylinder. This involves running a hone through the cylinder to remove glazing and provide the best possible surface for piston ring seal. This will improve power and piston and ring life.
  • Bore and Hone Cylinder When installing an oversize, big bore piston, the cylinder must be bored to the correct new bore size to allow installation of your oversize piston. The cylinder then must be finish honed to provide the proper surface for your piston and rings to work in, and provide best power and longevity. 

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