Silver Highlighted -Screamin’ Eagle® Evolution® 1340 Cylinder Heads

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Item Number: 16851-98A
We would be happy to order this product for you. It is currently not in stock. You can still add this product to your cart and we will order it from our supplier. We will ship it to you as soon as it arrives. Usually ships within 5 to 8 business days. Please expect 9 to 12 days for delivery.
Built right at the factory for unparalleled quality. The re-designed combustion chamber, optimized for flow and efficiency, works with stock or Hi-Compression Forged Piston Kits.Head come with larger than stock 1.898" intake valves and 1.623" exhaust valves. Valve Spring Kit P/N 18223-98 is used and can accommodate .520" valve lift. At 72cc, this equates to a 9.5:1 compression ratio with stock pistons. Use of 12mm spark plugs required. Use of Screamin’ Eagle® Spark Plugs P/N 32320-91 when flat-top pistons are used or P/N 32321-91 with high compression pistons is recommended. 50-state legal for 93-99 models when used with Original Equipment pistons, air cleaner, cam, exhaust, and ignition. 84-92 models require Threaded Cylinder Head Inserts P/N 29304-92. For race applications only.
*Caution Screamin' Eagle® Adjustable Pushrods are required for installation. Do not use high compression cast pistons with Screamin' Eagle® Twin Cam 88® Performance Cylinder heads. Failure to comply may result in engine damage.

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  1. Product Fitment

Fits 84-up carbureted Evolution® 1340-equipped models. May also be used on 84-up EFI Evolution® 1340-equipped models in conjunction with an approved ECM calibration. See H&M for details.
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