james Posted June 28, 2011 Share Posted June 28, 2011 what headers are you running? oem b18c4 or b8c6 are poo!! my first mod in the b18c4 was to replace the superior part of the headers for an oem b16a2 ( only the 4-2 ) quote]in what way is it a grate change? just niose or power?? Link to comment Share on other sites More sharing options...
mecateknic Posted June 28, 2011 Share Posted June 28, 2011 both .....the inner tubes are wider in the b16 manifold.....but without the iabs remove the noise almost be tye same ....power gain no doubt..this if your yet running the oem manifold b18 Link to comment Share on other sites More sharing options...
james Posted June 28, 2011 Share Posted June 28, 2011 would this be better than an after market 4-1 Link to comment Share on other sites More sharing options...
mecateknic Posted July 1, 2011 Share Posted July 1, 2011 would this be better than an after market 4-1it's all about the size of the tubes ....for an b16 primary tubes must be at least 43 mm ( europe measuring) and for an b18 45 or larger ....my weaponR headers as 47 ....exterior measuring off course .... but comparing the oem vs an stainless headers the oem lose..... now oem b16 vs oem b18 it´s a grand difference ....just measure yourself --------b16 inside 45 --------b18 inside 38,5 ----- quite the same right? Link to comment Share on other sites More sharing options...
james Posted July 1, 2011 Share Posted July 1, 2011 ok but why not use the whole mani instead of the top half Link to comment Share on other sites More sharing options...
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