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SCREAMIN' EAGLE PRO TWIN CAM ACR PERFORMANCE CYLINDER HEADS
J045082007-06-05
GENERAL
Kit Number
17166-08 (Silver) and 17165-08 (Black)
Models
For model fitment information, please see the P&A Retail Catalog or the Parts and Accessories section of www.harley-davidson.com (English only).
Additional Parts Required
This kit requires an ACR Overlay Wire Harness Kit (70623-06) except for 2008 Touring models which require ACR overlay harness kit 70623-08. These kits are available from a Harley-Davidson dealer.
Top end overhaul gasket kit (17052-99B)
WARNING
Rider and passenger safety depend upon the correct installation of this kit. Use the appropriate service manual procedures. If the procedure is not within your capabilities or you do not have the correct tools, have a Harley-Davidson dealer perform the installation. Improper installation of this kit could result in death or serious injury. (00333b)
NOTE
This instruction sheet references Service Manual information. A Service Manual for your model motorcycle is required for this installation and is available from a Harley-Davidson dealer.
Kit Contents
See Figure 1 and Table 1.
NOTE
This kit is intended for High Performance or Racing applications only and is not legal for sale or use on pollution controlled motor vehicles. This kit may may reduce or void the limited vehicle warranty. Engine related performance parts are intended for the experienced rider only.
REMOVAL
Prepare for Service
1. Position motorcycle on a suitable lift.
NOTE
If vehicle is equipped with Harley-Davidson Smart Security System, see Owner's Manual for instructions to disarm the system.
2. Remove seat according to the instructions in the Service Manual.
WARNING
When servicing the fuel system, do not smoke or allow open flame or sparks in the vicinity. Gasoline is extremely flammable and highly explosive, which could result in death or serious injury. (00330a)
3. Remove fuel tank according to the instructions in the Service Manual.
4. Remove Maxi® fuse. Refer to Service Manual for your motorcycle.
Remove Engine Components
  1. Remove existing air cleaner assembly. Refer to AIR CLEANER REMOVAL in Service Manual.
  2. Remove existing exhaust system. Refer to EXHAUST SYSTEM REMOVAL in Service Manual.
  3. Remove engine from chassis following the instructions in the Service Manual.
  4. Disassemble cylinder heads from engine. Refer to appropriate ENGINE sections in Service Manual.
INSTALLATION
Install Engine Components
  1. Install cylinder heads to engine. Refer to appropriate ENGINE section in Service Manual.
  2. Install engine in chassis following the instructions in the Service Manual.
  3. Install exhaust system. Refer to EXHAUST SYSTEM INSTALLATION in Service Manual.
  4. Install air cleaner assembly. Refer to AIR CLEANER INSTALLATION in Service Manual.
Install ACR Overlay Wire Harness
Refer to Instruction sheet for to install ACR Overlay Wire Harness Kit.
Final Assembly
1. Install Maxi® fuse. Refer to Service Manual for your motorcycle.
2. Install fuel tank according to the instructions in the Service Manual.
3. Install seat according to the instructions in the Service Manual.
WARNING
After installing seat, pull upward on seat to be sure it is locked in position. While riding, a loose seat can shift causing loss of control, which could result in death or serious injury. (00070b)
NOTICE
You must recalibrate the ECM when installing this kit. Failure to properly recalibrate the ECM can result in severe engine damage. (00399b)
4. Download the new ECM calibration using EFI Race Tuner Kit. Refer to Screamin' Eagle Pro Catalog or contact a Harley-Davidson dealer.
5. Start and run engine. Repeat several times to ensure proper operation.
Operation
Refer to BREAK-IN RIDING RULES in the Owner's Manual for instructions to break-in the motorcycle.
SERVICE PARTS
Figure 1. Service Kit: Screamin' Eagle Pro TC ACR Performance Cylinder Heads
Table 1. Service Parts
Item
Description (Quantity)
Part Number
1
Cylinder head assembly, front, black
Cylinder head assembly, front, silver
Not Sold Separately
2
Cylinder head assembly, rear, black
Cylinder head assembly, rear, silver
Not Sold Separately
3
Automatic compression release (ACR)
28861-07
4
Medallion, cylinder head (2)
16897-07
5
Race valve spring kit
18281-02
NOTES: For cylinder head assembly (1, 2) components, refer to 2008 FLHTCUSE3 (99428-08), FXDSE2 (99430-08) and 2008 FXSTSSE2 (99458-08) Parts Catalog for service part numbers (machined with seats and guides).