How to tell DPF from normal

Mar 26, 2007
713
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Norn Iron
When run in PUGs 306 I see it makes them smokier, thats what I was wondering, would the extra soot have a negative impact on the DPF

Also, does the DPF have a negative impact on performance of the leon? Would it go harder without it, can you take it out?
 
Lecatona HPFP (High-pressure Fuel Pump Upgrades)