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Hmmm. Its a stock S5 NA. Magnaflow cat, rebuilt air pump, corksport 2.5" catback with silencer installed, and a cone filter intake. I was up about 18 before the cold weather set in. Could it be the emissions bullshit?
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2004 Mazda6 V6 5-spd - still waiting on money for a motor
1991 Mazda RX7 NA 5-spd - my new DD with 145,000 miles
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