S&S 4" Sidewinder Big Bore Kit for 1999-'06 HD® Big Twin Models - Silver
Inspired by our Pro Stock Drag Race engines, these updated big bore kit utilizes a Ductile Cast Iron liner wrapped in cast aluminum for optimum thermal conductivity and performance. Bolt-in kits do not require 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
- Low friction Ductile Cast Iron liner
- 10.5:1 Compression
- Bolts in. No machining, balancing, or splitting the crankcases
- 88" engines are boosted to 100"
- Complete kits include cylinders, pistons, gaskets, and instructions
- Wrinkle black cylinders – matches stock finish
- Although not mandatory, we recommend adding an oil cooler to bikes ridden in warmer climates
|Stroke||Bore||Cylinder Length||Piston Type||Dome Volume||83cc CNC Heads||85cc Stock Heads||89cc S&S Heads|
|4||4.00"||4.937"||Forged||8.75 pop up||10.8:1||10.5:1||10.1:1|
*Not compatible with S&S 79cc Super Stock® heads
NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLE. Not legal for sale or use on any EPA pollution
Orders typically ship out within 1-2 business days.
Usually, we ship the same day. If the item purchased is unavailable, we will notify you of the delay. Some custom order items such as the Gigacycle Front end, Suspension, Saddlemen, Thunderheader, FAB28, or Plex Audio systems will take time to process, we will notify you of the current lead time. Once shipped your item should arrive at you in 1-5 days Domestic, 2-4 weeks international.
Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately, we can’t offer you a refund or exchange. To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund. If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
Exchanges (if applicable)
We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at email@example.com and send your item to: 2275 N Wilson Way, Stockton CA 95205, United States.
To return your product, you should mail your product to: 2275 N Wilson Way, Stockton CA 95205, United States You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund. Depending on where you live, the time it may take for your exchanged product to reach you, may vary.
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