Oh jesus, I just looked at that article.
GMPP Shorty headers? Also, the exhaust mods kept the stock cats, so dont know what you meant by test pipes...and a cheese GMPP intake kit, thats probably almost as effective as the crap-*** pop chargers for the 370.
Long story short, put some REAL bolt ons (long-tubes, HFC's or straight-through to a nice mandrel bent exhaust, and a better intake than that system), and you'll put some serious HP down.
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I don't own a car anymore.
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