4" Sidewinder Big Bore Kit for 2007-'17 HD<sup>®</sup> Big Twin Models - Wrinkle Black

4" Sidewinder Big Bore Kit for 2007-'17 HD® Big Twin Models - Wrinkle Black

Item #: 910-0599
5.0 out of 5
1 review | Write a Review
$1,099.95
PowerTerms

These bolt-in kits don’t require any machining, rebalancing or engine removal, and include just about everything you’ll need to complete the installation. The biggest cylinder bore that can be installed in a stock crankcase without machining!

Features & Benefits

  • Bolts in. No machining, balancing, or splitting the crankcases
  • 96" and 103" engines end up at 110"
  • Complete kits include cylinders, pistons, gaskets, and instructions
  • Wrinkle black cylinders – matches stock finish
Stroke Bore Cylinder Length Piston Type Dome Volume 79cc S&S Heads 83cc CNC Heads 85cc Stock Heads 89cc S&S Heads
4.375 4.00" 4.937" Forged .75 pop up 11.2:1 10.7:1 10.5:1 10.2:1

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2 of 2 people found this helpful

5 out of 5

FLS Slim Is Now a Monster

Fairly easy installation. Technical Support and Customer Service are excellent. I expect a DRAMATIC power increase as I mixed these with HD SE 254E Cams, Roller Lifters and my V&H FP3 Tuner.

I would recommend this product

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Disclaimer

NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLE. Not legal for sale or use on any EPA pollution