Xcceleration has built H6 motors... but their prices are NUTS.Take a look here about half way down.
For the lazy:
New Block - Disassembly and Cleaning (no core charge)
2. Ductile Iron Cylinder Sleeves
3. TWE High-Quench Forged Pistons (92mm)
4. Light Weight, hollow piston Pins and Clips
5. Piston Rings (92mm)
6. Parabolic I-Beam 4340 Billet con rod set w/ARP 2000 bolts
7. Heavy Duty Crankshaft Bearings
8. Heavy Duty Connecting Rod Bearings
9. Milling (decking)
10. Crank checked and trued to less than 0.0005" run-out
11. Crank Grind to achieve ideal tolerances, all pre-measured to +/- 0.00005", temperature controlled to +/-0.5 deg C
12. Rotating assembly balancing (Crank/Rod/Pistons) to +/- .05 grams
13. Rod bolt stretch measurement
14. Dry assembly with plastic gauge for bearing tolerance measurement post-check
15. Deck height measurement to confirm exact quench clearance
16. Cylinder bore measurement (Straightness and out-of-round checked to +/- 3 microns)
17. Oil galley clean and pre-lube
18. Assembly
19. Moly-graphite piston skirt coating
20. Ceramic piston crown coating
21. ARP Head Stud Kit
22. High Pressure Head Gaskets
23. New Engine Cases (No Core Charge)
24. New Crankshaft
Stage3 DOHC Cylinder Head Package
Power to 8500 r.p.m
0.419 inch lift for both intake and exhaust
and duration of 235 degrees at 0.050 Lift
1. Disassembly and cleaning
2. Port refinishing and bowl contouring
3. Custom 5-angle Valve Seat Machining
4. Hand Blending of the Port/Valve Seat Juncture
5. Combustion Chamber Cleaning
6. Valve resurfacing using the 'center-less' method which also measures the stem and head run-outs to 0.0004", Valves are replaced if this run-out is exceeded
7. Exhaust port balancing,
8. Milling of the cylinder head (depth is appropriate for application and combustion chamber work)
9. Stage3 Camshafts (419 lift), spring retainers, valve seats, lash caps
10. New Subaru Valve Seals
11. New Subaru Cam Seals
12. Assembly of the Cylinder Head
13. Setting of the Valve Lash
14. Graduated intake port finishing
15. Exhaust Port polishing
16. Combustion Chamber modifications, measurement and matching of combustion chamber volumes, polishing, and valve un-shrouding
17. Heavy Duty Valve Springs
18. Titanium Retainers
19. Intake port redesign
20. More extensive exhaust port modifications
21. Flow bench testing
New Stage2 Performance Longblock
*$38,499.
*Price does not include shipping, duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.
Have a good weekend guys.