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I only purchase the car a few weeks ago. I talk to the previous owner and he only installed a CAI and Magna flow exhaust and tune. I went by where he had it tuned and got a copy of the dyno run. Thats all I know of. I have taken it to dynospeed here in Memphis to fix and exhaust leak, I think I'll take it back and let them look it over and tune on there dyno. It don't hear any pinging from the engine but...... Dyno run showed 490hp and 490 tq. Had to take it to Chevy dealership to fix coolant leak, the one on the drivers side engine block.
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