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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.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
SUPERIOR SA643873 EXHAUST VALVE
No distinguishable difference between this seal and the higher priced TCM seal. Works great would buy again.
Works as advertised! Fast shipping
Fit perfectly solved intake leak. A&P
Product received as expected fits well, good performance
very helpful staff
they are all flat and round lol
The Valve Spring was a good fit
The Roto Coil Was Well Made and fit correctly
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.
Yes, the difference is the manufacturer. Yes, the manufacturer of SA30979-9 has FAA-PMA approval as a replacement for 630979-9.
Yes that is correct.