A Canadian retailer is corresponding with me saying SPX ands SPI are separate companies.
They declare and I quote "
They are SPX Pistons ( Not SPI ) We have put them in many jobs here and they are much more durable than stock.
$279 including Freight
Includes:
Gaskets and crank seals
2) Pistons
2) ring Kits
2) Wrist Pins
4) C-clips
Second Email
Yes If you just want pistons they are $189 shipped, the only gasket kit we offer is complete with seals - I don't know what your failure was but in the case of piston skirt issues we recommend splitting the cases and cleaning the crank. The Moly coating and ceramic top are a much better for heat transfer than stock and other after market. Even the chrome rings are coated for longer life. Guys were buying these pistons even in the warranty period because big bore guys like to ride not wrench. We've had great luck with them.
"end of Quote
A search on the internet for SPX resulted in ?
http://www.spx.com
SPX was founded in Muskegon, Michigan in 1911 as The Piston Ring Company. The company name was changed to Sealed Power Corporation in 1931. SPX adopted its current name in 1988
If this is the correct company they are a engineering conglomerate.
Then I found this dated 1997
www.dana.com :
Sealed Power Acquisition Makes Engine Products a New Core Business
Also in February, Dana acquired the assets of the worldwide piston ring
and cylinder liner operations of SPX Corporation for $223 million. The assets
purchased are SPX's Sealed Power Division in the United States, the operating
companies of Sealed Power Europe, and ownership in two North American joint
ventures. The acquisition provides Dana with a complementary array of engine
component resources and important new customer relationships around the world.
The acquisition also spurred Dana to elevate its Engine Products Group to core
business status.
I also found a catalogue in Canada with SPX branded carbides , tie rods , etc.
