So I've read many threads about various exhaust systems but I've never found one about the two that I'm considering. Should I go with a BadMab Shorty header with a 3" catted zzp downpipe and a 3" zzp exhaust without a muffler or resonator (will removing the resonator make it tooooo loud?)? Or should I go with the same 3" exhaust but with a zzp midlength header and a 2.5" catted downpipe with a 3" exit?

 

Mid length is gonna make more power, but you won't notice it unless you go Tvs or turbo or something big. And as far as sound, yes deleting the resonator would be really loud, but it's all about what you want and like

 

you cant go turbo on a mid length header and yes you will notice the performance increase on the m62 dont get rid of the resonator it will sound like hammerd **** and be unholy loud

 

Would getting rid of the resonator really be that loud? I'm not particularly a fan of overly loud exhaust systems, the damn resonator is an extra 80 bucks, but if it'll be that loud then I think it'd be an 80 bucks well spent.

 

Buy the resonator u will hate urself if u dont and then u will have to buy one and pay to have it welded in later on if u dont

 

Haha okay I'll spring for the resonator then. One more question, and I may sound like a noob for asking this, but where does the O2 sensor sit exactly? In the downpipe? Also, what is the difference between a normal O2 bung and an angled O2 bung?