Group N tophats

X-flow · Post by **X-flow** » Wed Aug 31, 2005 5:42 am

Where can one get Group N tophats, and what is the benefit of these? Yes i used search, absolutely nothing came up, or maybe i'm a n00b, you be the judge. Thanks

greg donovan · Post by **greg donovan** » Wed Aug 31, 2005 5:46 am

they are stiffer rubber.

thus keeping the suspension more consistant.

www.boxer4racing.com

THAWA · Post by **THAWA** » Wed Aug 31, 2005 7:49 am

You're a n00b.

tris91ricer · Post by **tris91ricer** » Wed Aug 31, 2005 6:28 pm

www.allsubaru.com

Post by **Legacy777** » Thu Sep 01, 2005 7:01 pm

Personally....unless you are doing other modifications to your suspension, ie stiffer/lowering springs and struts, I wouldn't bother with them.

The main advantage/benefit on stiffer suspensions is that with the softer stock rubber top mounts, the rubber compresses before the spring does, and the rubber is for all intents and purposes undamped, so you get the "bouncies" Putting the sti top mounts on there eliminate this, and make the springs/struts do what they're supposed to.

def09 · Post by **def09** » Sat Oct 15, 2005 5:11 pm

Any Subaru dealer has access to order them from the performance catalog, but they never refer to them as group N. Just as upgraded mounts by STi. The front ones are ST2031055000 each. Not sure about the rears.

kleinkid · Post by **kleinkid** » Fri Oct 21, 2005 4:05 am

Rear STi group N strut top mount part number is ST20370AA240. $110/pair from RalliSpec.

legacymax · Post by **legacymax** » Thu Nov 03, 2005 9:22 pm

So will these work with turbo legacies or do you have to drill different tophat holes?
-max

kleinkid · Post by **kleinkid** » Fri Nov 04, 2005 1:43 am

I recently purchased and installed STi group n top mounts on my 1991 Legacy Sport Sedan. Front part number ST2031055000, $113.00 from www.subarugenuineparts.com. They don't have the rears, so I got them, part number ST20370AA240, $110.00, from www.rallispec.com. The holes line right up and they fit fine. Late entry: I forgot to mention that the part number for the rear mount is for use with upper seat(perch)20373AA20 which is 92-92 Legacy and 93-01 Imprezza. The seat and mount are separate pieces. I don't know what the STi group N top mount part number is for the '91, which has the upper seat as part of the top mount.

Imprezive · Post by **Imprezive** » Tue Nov 22, 2005 2:16 am

Whoa kleinkid, what do you mean, the sprinb steat and mount arent connected?? Which ones did you order?

greg donovan · Post by **greg donovan** » Tue Nov 22, 2005 2:44 am

also when oredering these you need to remember to not panic and think you got ripped off when you notice that the part number stamped on the mount is the same as the number stamped on the regular mount.

they use the same mold but different rubber so the old part number is molded into the GN mount.

Post by **Legacy777** » Tue Nov 22, 2005 3:39 am

Yeah....the rubber is much stiffer. Plus the box it comes in has an STi part #.

kleinkid · Post by **kleinkid** » Tue Nov 22, 2005 10:38 am

Imprezive--I have converted to use 92-94 legacy or 93-01 Imprezza springs on my 91 SS. So now the upper spring seat and the top mounts are separate pieces. The original piece was an upper seat and top mount combination as one unit. I'm guessing, but I think you can buy STi top mounts for the 91. Did I answer your question?

Imprezive · Post by **Imprezive** » Wed Nov 23, 2005 6:28 pm

Yeah, I think that we should start a thread to collect the spring's and tophat's diameter to find out what works with what.

My brother tried puting stock wrx springs and shocks/struts on his 91' ss and the rears didn't fit. The bolt pattern on the shock was different and so was the spring diameter.

scottzg · Post by **scottzg** » Wed Nov 23, 2005 7:05 pm

Imprezive wrote:Yeah, I think that we should start a thread to collect the spring's and tophat's diameter to find out what works with what.

I thought that was a good idea several years ago.

http://bbs.legacycentral.org/viewtopic.php?t=2153

Imprezive · Post by **Imprezive** » Thu Nov 24, 2005 6:07 am

Oh, I never really looked at that, sorry, that answers a lot of my questions...

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Group N tophats

Group N tophats