I'm driving a GTi with Hotbits extractor, stock muffler but with 2 inch piping and giving a terrible note, i'm planning to change back to stock piping soon...I think my Hotbits is starting to bocor, so i'm planning to change it to PZ extractors. Before i do that, i think my engine is out of tune; fuel comsumption is terrible, RM40 wont get me 300km...And occasionally, my engine oil decreases terribly. I drive my GTi everyday from Klang to Cyberjaya u see. I and i cruise often at at...
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