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I don't really want to admit this here......but I thought it was good info to share to save others a headache. Espescially those of use with piles of Subaru parts lying everywhere. So.....the point. EJ25d heads use a shorter bolt than the EJ22e. About 8mm shorter. How'd I find out you ask??? Well.....my freshly rebuilt (rings, bearings, valve job, port and polish) EJ22 started showing headgasket signs Heater blowing cold, overpressurized system, coolant pushed out the resevior, and once enough lost, car runs hot/overheats. So I said.....damn......well......it's new engine with composite gasket.......Why not retorque? It's only been 10k miles or so, and the head bolts are outside the valve covers on an EJ22e so why not. Well when I put a wrench on the middle bolts on the drivers side the bolt turned, too easy, waaaaay to easy.....and just kept spinning and spinning. So did the next one. So did the middle ones on the other side. Outer bolts torqued down ok.....but I knew it was not good. Drove a few days more and now the headgaskets were worse. So yesterday I pulled it and dropped a EJ18 in for temporay use. Took apart the EJ22 and found I had used the short EJ25d bolts! NOOOOOOOOO!!! they were only catching 4 or 5 threads and stripped out the threads in the block. Took off both heads, dropped the oil pan, and took the shortblock into the machine shop to fit with inserts. Dumb mistake. Don't be a dummy. You've been warned.