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yes, absoluetely, they give your engine more fuel but your engine has nothing to burn that extra fuel, so carbon deposits keep building up on your valves and you lose way more power then you had to begin with
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2001 Grand Prix GT: cat/u-bend/resonator delete, zzp PLOG, Custom Intake, DHP PCM,
1981 Fairmont 6cyl 3 speed
1978 Ford Ranchero GT 302 with a few goodies
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