S&S 4" big bore cylinder and piston kit boosts Twin Cam 96/103 Harley-Davidson big twin engines to 110" displacement. This kit does not require any machining, rebalancing or engine removal, and includes just about everything you'll need to complete the installation. These are biggest cylinder bore that can be installed in a stock crankcase without machining!
Bolt-in kit requires no machining, balancing, or splitting the crankcases
Converts Twin Cam 96 and Twin Cam 103 engines to 110 cubic inches of power
Complete kit includes cylinders, pistons, gaskets, and instructions
Powder coated cylinder finish matches stock finish of your bike
Made in the USA
Product Note:
Specification
Details
Bore
4 in.
Color
Varies (make selection above)
Compression Ratio
10.5:1
Country of Origin
USA
Displacement
110 CI
Engine Type
Twin Cam 96 / Twin Cam 103
Finish
Powder Coated
Material
Aluminum
Piston Type
Forged
Stroke
4-3/8 in.
Vehicle Fitment
Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.
Compression, 9.7:1 stock comp on a 103 ci this kit say 10.5 that alone will it jump hp up ?
By Zee girl HD
9.7,1 stock comp on a 103 ci this kit say 10.5 that alone will it jump hp up ? I don't the extra 7 cubic inch would do anything?
Yeah, higher compression and bigger bore is going to result in a noticeable jump in power. Especially when it the bike is tuned properly to add the fuel needed it should make some good numbers.
I have heard there is problem with failure putting these on a 96 when having to high of compression. Have your company had problems with this?
By al
S&S does recommend that this kit not be used if you're planning on having higher than 10:1 compression ratio for Trike or Tri Glide models. They also mention that it is not compatible with the S&S Super Stock 79cc heads.
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