InsaneTroglody Neutral Newbie June 10, 2018 Share June 10, 2018 I have just changed my factory extractor to 4-1 extractor. after changing I dont find any significant difference in engine power. However the engine noise is louder with metallic tapping sound when I rev pass 100km/h. Is this normal and what does the metallic tapping sound indicate? I have just changed my catalytic conver as well but retain factory pipes. Muffler was changed last year due to leakage issue. ↡ Advertisement Link to post Share on other sites More sharing options...
Ragingbull Internal Moderator June 11, 2018 Share June 11, 2018 @Insanetroglody i've created a topic for you here Link to post Share on other sites More sharing options...
Vratenza Supersonic June 13, 2018 Share June 13, 2018 What kind of high performance car require an extractor mod that did not result in any performance gain and yet introduce weird noises.... Link to post Share on other sites More sharing options...
InsaneTroglody Neutral Newbie June 14, 2018 Author Share June 14, 2018 @vratenza the weird noise is indeed annoying! planning to change back to factory extractor. Im a car mod newbie here planning to increase hp. it's a kia rio cinco. Any opinions on increasing power that really works? Link to post Share on other sites More sharing options...
inlinesix Supersonic June 14, 2018 Share June 14, 2018 @vratenza the weird noise is indeed annoying! planning to change back to factory extractor. Im a car mod newbie here planning to increase hp. it's a kia rio cinco. Any opinions on increasing power that really works?Save $$$$. Buy Stinger GT Link to post Share on other sites More sharing options...
Watwheels Supersonic August 6, 2018 Share August 6, 2018 I have just changed my factory extractor to 4-1 extractor. after changing I dont find any significant difference in engine power. However the engine noise is louder with metallic tapping sound when I rev pass 100km/h. Is this normal and what does the metallic tapping sound indicate? I have just changed my catalytic conver as well but retain factory pipes. Muffler was changed last year due to leakage issue. Should be engine knock. Can say bye bye to your engine. ↡ Advertisement Link to post Share on other sites More sharing options...
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