ahhh ok, sorry for asking so much but i done research and havent been able to find out anything, but so far ive found that, i could go either (need some correcting please)
TODA headers (can explain difference between 4-2-1 and 4-1 please? sound, power, gains, mid, top end, low etc), (JDM cat, AUDM cat??? or the TODA cat), mugen catback exhaust (is it twin loop for the b16b .. b16a ?)
OR
mugen headers 4-1 (JDM AUDM cat ???), mugen catback exhaust (again, twin loop?)
this is all for the ek4. any opinions etc and corerctions please ?



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