pjinca

Not quite, if you add an AIR INTAKE you will lose power and performance for the sake a "whooshing" sound. Headers are pretty effective, just that cleung got headers that were made for the 3 series (same M54 engine) and had them adapted to the E60. His results, as I recall, were better performance AND a throatier growl

cleung

thank pjinca. Yeah definite more growl, to the point where I ended up having to install some resonators midstream to tame it down a bit. There is a definite increase in power I can't quantify it because no one in my area has a dyno machine. There are many threads regarding headers on the 3 series forums that go in to much more detail. What I had to do was install 3 series headers and have the flange rotated to fit the rest of the exhaust. If I were to do it over again I would have rotated the flange on the exhaust pipe as opposed to the headers. Still one of my favorite mods on my car, currently I have my O2 sensors taken out and sent to someone for modification to eliminate the CEL.

Iteachgolf

The stock headers are a HUGE bottle neck. With a supercharged car you can pickup as much as 20whp. I have the VF supercharger and will get it installed as soon as I'm not traveling. Hopefully in next 2-3 weeks. I am paying $750 for installation.

VF Engineering

That's a sweet mod. Do you know if it would be possible to do the same thing for a 525? mine has straight quad pipes from the cats. my only pic of her (still looking for oem fenders btw)

VF Engineering

For the extra 105hp, the GB prices aren't bad at all. There's no need for Dyno tuning. The custom ECU flash is included with the kit.

Installation should be around $800-1k. The $750 iteachgolf got is a good deal. Book time for install is 6-9hrs.

spediegunz

Sound clip or video?

cleung

I believe you can it should be the same headers. YOu might want to go to e46fanatics forum and do a little research to make sure.

cleung

Take a look at the old thread I started when I put them in. Keep in mind that the sound clips are of the car before I installed the resonators.

https://5series.net/forums/topic/110...eaders__st__30

spediegunz

Ok not bad I'm not a huge fan of noise but i expected it to be louder. I notice you had a few lights on , on the dash is that a result of the super charging or headers

cleung

I'm not supercharged I just have headers right now. The check engine is from the headers, I just sent my O2 sensors away last week to get them modded to get rid of the light. There are a few ways to get rid of the check engine.