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Rob the Elder, I just read your post, I have a 2008 GXP that I purchased Dec. 2015. I just read your post from 7/2013, where you were recommending to Queso the following:

1. DDM probeam
2. DDM backbone
3. GMPP tune (if GXP)
4. Solo high flow cat

The first two I am having installed by DDMWORKS at the Arkansa rally in June. What is a GMPP tune and a Solo high flow cat?

I am in Austin, Texas

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