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551 cams are not recommended for compression ratios of 10:1 or greater.

Greatly improves low-end and midrange torque, strongest from idle-4000rpm.

**551 cams are not recommended with compression ratio of 10:1 or higher.

Meant for engines up to 96" and 10:1 compression ratio.

3000-5000 rpm.520: A replacement part for S&S emissions certified engines, this is a short duration emissions cam with very little overlap to reduce emissions of unburned hydrocarbons.

Intended for engines of 95 CID or more w/compression ratios between 10.5:1 and 11.5:1. 675: A high lift monster, this cam set is designed for 120” or larger engines with at least 11:1 compression ratio. Note: S&S® offers a variety of cam grinds for 1999-up big twin engines in both chain drive and gear drive versions.

Cams that exceed the limits of the stock valve springs require the use of special high lift springs.

All reference to H-D® and Andrews® part numbers is for identification purposes only.

We in no way are implying that any of S&S Cycle’s products are original equipment parts or that they are equivalent to the corresponding H-D® part number shown.Quiet valvetrain with excellent low/mid range torque for touring and 2 up riding.510V: Bolt-in cam that works well with stock or ported heads.Improved ramp design results in low valve train noise.Both come with our Easy Start automatic compression release feature for quick starts. Bolt-in overall.583: Optimized for use in the Softail®/Dyna® lines, this cam makes horsepower and torque that you can feel all the way through the rpm range, making the most power right where you need it:1500–5000rpm.Fits all 2009-2012 Harley-Davidson®Tri-Glide® models. Bolt-in.570: Designed for 88 to 96 CID engines with compression ratios between 9:1 and 10:1 this cam will provide a nice power increase across the entire power band. Bolt-in.585: Designed for 88 to 95 CID engines with compression ratios from 9.7:1 to 10.5:1 and 100 to 124 CID engines from 9:1 to 10:1 compression.At cranking speeds, the lobe bumps the exhaust valve open slightly during the compression stroke, making the engine much easier to turn over.

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