Part# 08-11749
MFR Model# SL36006W-A20
Vendor Part NumberQuantity Needed for InstallDescriptionPart Number


Uniform hardness all the way through the steel barrel walls which allows the barrel to provide even wear while withstanding extreme cylinder temperatures and pressures.

Exhaust and intake ports are volumetrically matched to maximum output and performance.

Increased port wall thickness - eliminates problems with warping and cracking.

Computer-generated head fin configuration - deliver more uniform heat transfer and fewer "hot" spots.

Manufactured from the most advanced alloys available - exceed industry standard for strength and porosity.

+ Included with stud assembly.
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WARNING: Cancer and Reproductive Harm -


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Curt H Verified Purchase


June 19, 2021

Great Product, good price , fast shipping

Burt S
April 20, 2021

Parts arrived on time and with no damage. Aircraft Spruce is awesome !! Thanks, Matt

December 6, 2019

Great quality but I wish they would go ahead and size the rings and install the piston, like they used to do. Would also be nice to be able to request a specific piston weight to better match what was removed from the engine or the opposite cylinder piston. I ended up using my old piston in the new cylinder to avoid a 20+ gram mismatch.

Volo A
February 22, 2018


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Do these come Millenium Cylinders come assembled?

Per Superior: Our cylinders are assembled into a valve assembly and the customer has to fit the rings to the piston and piston to the cylinder.

Q: Does Millennium cylinder assembly SL36006W-A20P, your part number 08-11749, come with the piston and ring?

Yes, this will come with the piston and ring.

Q: Are the Superior Millenium Cylinders interchangeable with the Lycoming cylinders?

Yes, they are interchangeable. This model is for engine models: O-360-A, C, F, G; IO-360-B, E, M; HO-360-C; HIO-360-B; LO-360-A; AEIO-360-B, H; O-540-A, E, G, H; IO-540-C, D, N, T; AEIO-540-D (Wide Deck).

Q: Are the Superior Millenium Cylinders #08-11749 interchangeable with Lycoming cylinders of O-360-A1AD serial #L-28803-36A?

Per Superior: Yes. It is eligible and interchangeable with O-360-A1AD.

PMA No. PQ0060SW Supplement No. 1 Eligibility SL36006W-A20P Revision No. A Page 2 of 3 PART NAME PART NUMBER REPLACEMENT FOR APPROVAL BASIS AND APPROVED DESIGN DATA ELIGIBILITY (MAKE) ELIGIBILITY (MODEL) IO-360-B1E IO-360-B1F IO-360-B1F6 IO-360-B1G6 IO-360-B2E IO-360-B2F IO-360-B2F6 IO-360-B4A IO-360-L2A LO-360-A1G6D LO-360-A1H6 O-360-A1A O-360-A1AD O-360-A4P O-360-A1P O-360-C4F O-360-C4P O-360-A1D O-360-A1F O-360-A1F6 O-360-A1F6D O-360-A1G O-360-A1G6 O-360-A1G6D

Q: Does the Superior cylinder SL36006W-A20P, come with piston pin and plugs?

No, you will also need the SL13444-1 (our part # 08-11595) which is the pin & plug assembly

Q: Will this cylinder come with the necessary paperwork so my AP mechanic can legally install it in my certified airplane?

This unit is FAA PMA'd for install on certificated aircraft. Copies of the PMA are available on Superior's website.

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