Actually, CXracing and BC Racing coilovers use a larger threaded damper than Megans. I believe EMUSAs are the larger thread as well.
I've got a friend with CXracing coilovers on his s13 that bought the Megan extended lower mounts thinking they would thread on, especially since the general consensus out there is that CXracing/Megan/BC/Godspeed/Apexi/EMUSA/etc are all from the same factory in Taiwan, called Bor-Chuann. However, to our surprise, not only would the Megan mounts not thread onto the CXracing dampers, but the reason why is because the CXracing uses a bigger thread.
Don't know if this has anything to do with why I've seen Megan coilovers blow out (not necessarily more than average, but just some, which is normal since coilovers are wear items) yet out of the 10+ friends I know that have CXracing coilovers, not a single one of the CX coilovers has ever blown out or had a single problem period. Wish I could say the same for my JIC Magics.
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