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PERFORMANCE MOTORCYCLE PARTS AND KITS FOR AMERICAN V-TWINS

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Sidewinder® Big Bore Kits for 1966-'84 Big Twins

 
 
 
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S&S Sidewinder® 3 5/8" big bore kits have been a popular way to increase the displacement of shovel engines since 1977. Available in displacements from 88" to 103". Sidewinder kits are configured to order and optional parts are available. Stock cases and heads must be bored to accept 3 5/8" bore cylinders.

Features and Benefits

  • Increase displacement and power
  • High strength cast iron cylinders with increased cooling fin area
  • Stock like appearance—durable black powdercoat finish
  • Easy installation
  • Long engine life, good dependability

Options

  • Displacement 88", 93", 93" HC, 96", 98" and 103"
  • Standard pushrod kit or S&S valve train conversion kit
  • Cam selection
  • Optional parts available—Cylinder heads, S&S retro conversion kit (pan style heads and upgraded valve train), and S&S valve train upgrade kit

 

 

Complete S&S® Sidewinder® Kits For Shovelhead Engines  
Displacement   Stroke   Piston Type   CR
1966-’69   1970-’84  
 93” 
 4 1/2”   Forged 8.5:1  91-9127 
 91-9128 
 4 1/2”    91-9127    91-9128  
 93” HC    4 1/2”   9.1:1 
    91-9130  
 96"    4 5/8”   9.1:1  91-9133    91-9134  
 98"    4 3/4”    8.9:1 
    91-9138  
 103”    5”   10.7:1 
 91-9139    91-9140  
 CTO         106-5835 
 Not legal for sale or use on CA or EPA pollution controlled vehicles 1978 and later.  

 

Customer Reviews
Overall:
Name:
Bikerlink
Date:
11/27/2012
Review:
Installed 96in hp with 560S cam 30,000 miles ago best upgrade ever been eatin twinkies(twincams) since
Rating:
Name:
Tony / Eastlands Engineering
Date:
03/27/2012
Review:
Put a 103 kit on Your SHV and be noticed. The torq is awesome.
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