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Old 07-02-2012, 06:43 AM   #3
FatalElement
Scooby Newbie
 
Member#: 188785
Join Date: Sep 2008
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I am running a stock STI 2.5 liter short block with my 04 WRX 2.0 liter heads with 1.5mm Cosworth head gaskets and have been for about five years now. I have gone though two gear boxes now and I'm only making 310whp and 319 lb ft of torque on a TD06 18G. I finally went with PPG straight cut gears with the STI RA 5th. The 5th gear was left over from the first rebuild which was the STI RA 5 speed.....it lasted about six months. I have had no problems with the PPG gear box so far, I am sure if I upgraded again power wise the box would not last. So if you are going for 400whp budget some money for the STI 6 speed it will save you money in the long run. Side note I would like to know what was meant by deshrouding the heads?
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