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Engine cases are the foundation of your complete engine project and we offer the finest available in the industry. Improved appearance and design features in almost every area of these castings along with their exceptional price make these a must when replacing worn out or weak stock castings. These cases are produced from prime C355-T6 which is a commonly used military alloy and known for its stability over multiple heat cycles. Machining is done on state of the art CNC machining centers using hydraulic fixturing for repeatability.
This along with other solid quality features like O-Ring sealed press in high carbon steel inserts, counter bored allen case bolts, Large 1/4” NPT drain plug, clearance for up to 5” strokes and a high volume ported breather make these a professional engine builders choice for your next high performance engine.All case kits come with the main bearings, cam bearing, chromoly cylinder studs installed and the pinion race sized to 1.751”. Also included are the main seal, main seal spacer, top end feed screen and spring, chrome timing hole plug, stainless steel case bolts and the oil pressure gauge. Cases are available for all 1984 & later Evolution® engines in Natural or wrinkle Black finish, in 3-1/2” or 3-5/8” configurations, and
3-7/8” or 4” bores for 1992 & later.
See Below for pics of
Black & Polished Cases

engine case


Ultima® Engine Cases

Case exploded

1. RIGHT CASE MW Evolution 2. LEFT CASE MW Evolution
3. 98-536 6-11/16” length cylinder studs 98-547 6-1/8” length for 4” & 4.25” bore cylinder studs
4. 98-542 Breather seperator tube for case 5. 98-540 Dowel pin, .500 x .500 for case
6. 300-534 Case bolt, 5/16 - 18 x 3 - 1/2 7. 300-533 Case bolt, 5/16 - 18 x 2 - 3/4
8. 300-535 Case bolt, 1/4 - 20 x 4 9. 98-544 1/4” Pipe plug for case
10. 300-453 Bushing, oil pump Big Twin 36-L 11. 98-511 Spring, crankcase oil screen BT
12. 98-510 Cranckcase screen, BT 70/99 24981-70 13. 98-543 3/16” High pressure plug for case
14. 300-541 Dowel pin, .500 x .500 for case 15. 95-320 Bearing, complete HD 9028
16. 98-490A Timing plug for Ultima Motor assy. 17. 17-65 Switch, oil pressure V2
18. 95-173 Bearing, cam case HD 9058 19. 95-805 Oil seal, HD 12026-high quality
20. 98-545 10-24 set screw for case 21. 98-360 Spacer, SPK shaft 71-99 BT
22. 95-429 Race, bearing BT 24599-58B STD 93-up
23. 98-577A Dowel pin for cylinder (for 4.25 & 4.40 bore motors) 98-540 Dowel pin for cylinder
24. 95-809 Needle bearing 1.5 shaft 1.25 width (4.25 bore)
25. 98-581 Case pinion bearing retaining ring 26. 98-538 Screen plug for Ultima motor

black Case
polished Case

 

 

 

See Below
for Exploded
Views of
Engine Case
ENGINE CASES
206-54 1984 Thru 1991 3-1/2” bore
Natural finish case kit.
206-55 1984 Thru 1991 3-1/2” bore
Wrinkle Black finish case kit.
206-52 1984 Thru 1991 3-5/8” bore
Natural finish case kit.
206-53 1984 Thru 1991 3-5/8” bore
Wrinkle Black finish case kit.
206-56 1992 & Later 3-1/2” bore
Natural finish case kit.
206-57 1992 & Later 3-1/2” bore
Wrinkle Black finish case kit.

206-50 1992 & Later 3-5/8” bore
Natural finish case kit.
206-51 1992 & Later 3-5/8” bore
Wrinkle Black finish case kit.
206-42 1992 & Later 4” bore, S&S bolt pattern,
Natural finish case kit.
206-43 1992 & Later 4” bore, S&S bolt pattern,
Wrinkle Black finish case kit.
206-40 Fatso Engine Case, Twin Cam bolt pattern,
Natural finish case kit.
206-41 Fatso Engine Case, Twin Cam bolt pattern,
Wrinkle Black finish case kit.