I have been running stillen sc with topgunz air to air upgrade with stock pullies for 20, 000 miles so far with a stock 7a trans. It's a conservative tune just over 400whp and my trans is starting to slip and have issues. I'm getting the level 10 upgrade in the next 2 weeks. I thought the trans would hold up with the SC being low torque and a mild tune but it wasn't to be. After trans upgrade I'll install my 9 lb pulley and tune more for performance. I can't wait to see how she reacts!
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