I'm going to be swapping a GS-R transmission into my auto LS and I can't seem to find a straight answer or really any answer at all whether I need a GS-R engine stiffener or an LS one? On Acuraoemparts.com, the GS-R & LS stiffeners have different part numbers, so I assumed they were different? Here is a pic so you know what I'm talking about, it's #9.

 

The GS-R actually has 2 stiffeners - the #9 one shown there, and another smaller one on the forward side of the engine.

Who knows if the #9 is the same or not. It looks very close to being the same in that diagram and the GS-R engine diagram. Actually, there are 3 different part numbers for #9, 1 for the B18C1, 1 for the B18B A/T, and 1 for the B18B M/T.

Just see if yours will fit. If it doesn't, you can still drive easy on it until you can order a different one.

 

A fellow Integra owner that swapped in a GS-R transmission said that his automatic mount didn't fit. He doesn't have the mount on the car yet, so he isn't sure either which one would work.

 

Also, I did notice that the GS-R had a front one as well, but I was told that I didn't need it for sure. Plus I was unsure if the B18B motor would have the holes for it since it is a B18C only thing.

 

Problem: he has a manual transmission being swapped into a automatic chassis...the AT tranny mount is positioned higher than a MT one...

Solution: Auto-to-Manual conversion mount. Hasport/Innovative has them.

I know since I've done a AT-2-MT conversion.

 

just my 2 cents:

just have the motor and tranny be held by the usual three motor mounts to hold it...if you still have your torque mounts, the better.

I don't even have an engine stiffener in my car and is only being held up by three mounts with polyurethane - 1 Hasport AT-2-MT mount, and 2 stock mounts with polyurethane using window-weld. works though.

 

Yeah, he did the innovative mount. I'm talking about the engine stiffener.