bro..im new here..u said 'the best muffler for manual tranny is no muffler at all..currently im running on 3in straight pipe with FGK muffler..for ur information the previous owner was running on the same setup but without FGK..only straight 3in pipe..so is it ok if i changed the current setup with my previous setup..my engine is evo1 with 67 blok..running on 0.6bar(Low Boost)..approximately 240-250hp..previous owner was running on 1.4bar..approximately 318-320hp..n thanks in advance for ur help..
The free-est flowing would of course be a straight pipe lar, but can you tahan the sound?
Theres a reason why racecars all have straightpipes . I'd go with a 3" straight through muffler and try to gain power elsewhere if I were you haha.