Herderson Performance Technologies in New Braunfels is where several of my friends have had there cars dynoed and were very happy with the shop and service. I haven't personally gone there, I took mine to Uprev also but I do here good things about Henderson.
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 STILLEN G3 / F.I. TDX (NO RESONATORS) / F.I. LTH / UpRev Tuned / BC-Racing ER Coilovers / DIY Oil Cooler / Short Shifter
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