Is there a definitive list stating the differences between the GT3 and GT3RS? What I know of from memory is:

• 44mm wider rear bodywork (but how much wider is rear track width?)
• Lighter weight (not as much so for US spec cars though)
• Lightweight flywheel
• No sunroof
• Polycarbonate rear windows (not avail in US)
• More agressive front splitter and rear wing
• Stickers for badging
• Yellow stripe on steering wheel
• Different color options and RS theme

The list so far is fairly common knowledge I think. Also, some things I'm not so sure about but have seen mentioned:

• Slightly modified ECU map to better take advantage of the lighter flywheel
• Slightly modified control arms or rear subframe, but I'm even less sure about this.

I'm sure I missed a bunch of stuff, but if I knew for sure I wouldn't be asking

 

Hey Roland I believe the track is what is 44 mm wider. That's why the rear wheels are not interchangeable between the GT3 and the GT3RS. They have different offsets because of the track difference.
There are no suspension differences. The ECU issue to me is BS.
I put the single mass flywheel on the GT3 and had no software adjustment for it.

Cheers, GT3Ranger...Juan

 

I've heard the LSD is slightly different too, can't confirm though.

 

Side rockers are two piece. Bottom half is black (unless painted option).

This applies for all wide body (i.e., GT2, Turbo, C4/S, RS). Helpful identifying the diff between C2 and C4 when they flying the opposite direction.

 

price is different

 

Porsche's web page has a side by side comparison.

 

From what I'm told and what I could see, the RS has a different 2-piece control arm in the rear for more precise camber adjustment. I think this is the piece that is "homologated" for the race car. In addition, it also appears that the uprights in the RS are lighter, since it is hollow cast.

 

Since my last reply I read that the ECU's may actually be slightly different taking into account the LWFW of the RS.