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Ships within 48 hours · Estimated delivery Jun 24 - Jun 29
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Description
S&S Cycle 106-3688 97" Big Bore Forged Pistons For 1999-'06 HD® Big Twins - 3.927" Standard BoreS&S Cycle 106 3688 These big bore pistons work with the stock 4" stroke flywheels to convert any 1999 '06 HD big twin engine from 88" to 97" displacement with 9. 7: 1 compression with stock heads. Stock cylinders may be bored to accommodate larger pistons, but we recommend S&S 3. 927" bore cylinders which feature high strength alloyed cast iron liners. Pistons are compatible with stock rods with tapered wristpin ends. S&S 3. 927" bore pistons are
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Best in 7 days
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Best in 7 days
Best in 7 days
4.0 ★★★★★
Based on 194 reviews
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Product Reviews
★★★★★ 5
Good
Style: CF285
Perfect fit for my car 👍 The cabin air filter was easy to install and immediately improved the air quality inside. Good quality and great value for the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
★★★★★ 5
Perfect fit, and it works
Style: CF211
This was a great price and a very good filter so far perfect fit easy to put in
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Easy DIY for value & performance.
Style: CF174
Quality Air filter and perfect fit for 2013 Lexus GS 350 F Sport.
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Reviewed in the United States on May 19, 2026
★★★★★ 4
Filter
Style: CF157
Arrived in a timely manner. Package was delivered securely without damage. Fits perfectly in said vehicle. Easy to install.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Fits Tesla , very snug and odors are gone!
Style: CF774
Great replacement for my Tesla 2024 Highland Model 3. Easy to install. Will definitely be buying in the future! Cheaper than having Tesla do it.
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Reviewed in the United States on May 22, 2026
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