APE's super state-of-the-art Serdi cylinder head machine, with triple-float head for the most accurate valve seats possible. The Serdi uses a multi-angle carbide cutter that has the seat shape ground into it. This ensures that all angles are exactly the same - all seat widths are exactly the same. A perfect valve job. APE CYLINDER HEADS Cylinder head work at APE is done on the latest state-of-the-art equipment. We have facilities to completely rebuild all motorcycle heads. As a manufacturer of high-performance cylinder head components, we have all of the parts in stock: bronze valve guides, stainless steel valves, valve springs, titanium retainers and more. Everything we need to complete your job without waiting on the parts - which slows down most shops. The only exception is our porting department which is always backed up. If you are in a hurry for porting send it elsewhere. If you want state-of-the-art work with reasonable turn-around, we are ready to serve you. We also operate a complete aerospace-type CNC machining facility in which we manufacture our world-famous racing products. These facilities are all on-site at the APE race shop. Besides the head services listed below, APE also offers: Complete Machine Work Service Crankshaft Service Transmission Service APE provides online pricing as a service convenience only. These prices are not binding and are subject to updates without notice. Though we try hard to maintain accurate up-to-the-minute pricing it is best to call APE and check with the desk for pricing if you have any questions. Head Work When shipping a cylinder head to APE please read our Shipping Instructions carefully. Include an APE work order form when sending parts in for labor. Ship parts to: APE 7347 Rosamond Bl. Rosamond, Ca. 93560   **NOTE: HW-3-4S, HW-4-4 and HW-5-4 are for single cylinder engines.  HW-3-4S Install bronze valve guides - labor only - single cylinder head** $65.00  HW-3-8 Install bronze valve guides - labor only - 8 valve head $65.00  HW-3-8S Install bronze valve guides and size for valves - labor only - 8 valve head $95.00  HW-3-16    Install bronze valve guides - labor only - 16 valve head 99.00  HW-3-16S    Install bronze valve guides and size for valves- labor only - 16 valve head 135.00  HW-3-20 Install bronze valve guides - labor only - 20 valve head 119.00  HW-3-20SS Install bronze valve guides and size for valves - labor only - 20 valve head 150.00  HW-4-4 Performance (std size) valve job - single cylinder head** 79.00  HW-4-8 Performance (std size) valve job - 8 valve head 189.00  HW-4-16  Performance (std size) valve job - 16 valve head 229.00  HW-4-20 Performance (std size) valve job - 20 valve head 325.00  HW-5-4 Install oversize valves and blend ports, each side - single cylinder head** 59.00  HW-5-8 Install oversize valves, each side, 8 valve 99.00  HW-5-8-B Blend oversize seats to port, per side, 8 valve head 99.00  HW-5-16  Install oversize valves, each side, 16valve 139.00  HW-5-16-B Blend oversize seats to port, per side, 16 valve head 105.00  HW-5-20 Install oversize valves, each side, 20 valve 175.00  HW-5-20-B Blend oversize seats to port, per side, 20 valve head 130.00  HW-6 Cam clearance Kawasaki head 75.00  HW-7  Assemble head (Seals extra) included in valve job 59.00  HW-7SP Adjusting spring heights when assembling head 50.00  HW-10 Install idler adapter in GPZ head 65.00  HW-20-8 8-valve head. Disassemble, inspect, clean combustion chambers and valves, lap valves in. reassemble. NO PARTS INCLUDED. Seals extra. 125.00  HW-20-16 16-valve head. Disassemble, inspect, clean combustion chambers and valves, lap valves in. reassemble. NO PARTS INCLUDED. Seals extra. 160.00  HW-40 Port and valve job 8-valve 850.00  HW-45 Port and valve job 16-valve 950.00  LC-415 Machine one valve stem 15.00  LC-420 Machine one valve head and stem 20.00  LC425 Grind one valve face 4.00  LC-350  Surface cylinder head 30.00  LC-845  Open combustion chambers to match piston dome 150.00 **NOTE: HW-3-4S, HW-4-4 and HW-5-4 are for single cylinder engines. All prices subject to change without notice. Porting with complete head assemblies only