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Discussion Starter #1
I have a 2007 GXP with the GMPP upgrade CAI and exhaust. I was wondering what the difference is from a power standpoint from that to the RPM Stage 3 and if anyone has had the Stage 3 on for awhile and noticed any problems or drivability issues. Thanks
 

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You may also want to ask this question on FB since RPM posts often on a couple different Kappa groups. Usually when someone asks the question on FB several people posts their opinions quickly. Plus you can search the Kappa Groups for old posts.
 

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I recommend you do your research. RPM is a reseller and some people are very happy with the results. Others not so much. You need to make up your own mind.
 

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Take a look at Daves stuff at Performance Autowerks.
 

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I've had a couple of Stage 3 upgrades from Martin and they have been terrific. He is donating one on our latest GXP charity car within the next couple weeks. The power is a vast improvement over the GMPP upgrade. Who is doing the install and tune for you?
 

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Discussion Starter #6
I'm hoping to find someone reliable in Maryland or Va. that can do it.If not its probably not out of my capabilities
 
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