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

Mouse over for detail
Click to enlarge photo
Item Number: 16851-98A
This item can STILL be ordered. 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.

Click icon for more information
  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.
Go Back
Now: $0.00

Ships in 5 to 8 days  

Product Options: