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76mm from turbo and after the middle split for 2x 63,5mm.

I'm just helping showing a different option than DPF deleted or aftermarket mufflers. Straight overbore pipes after the dpf or even just mufflers bypass is also a great option:

1. It turns into...

Only straight pipes after DPF:


http://www.youtube.com/watch?v=7hLw56K7aHw

Full turbo-back exhaust (Cat and DPF deleted):


http://www.youtube.com/watch?v=ml0AJmZ-jQI

The car has both turbos modified,, the small and big. So the powerband is the same but at a higher scale.

We made several dynos but only printed the last one. But the graphs looks all pretty much the same, only the scale differs.

My exhaust is custom made. I have a friend with a E92 330d and he has a silimar exhaust made also by the same shop. The only difference is that he only have two mufflers. I really doubt that any...

The tranny made +100.000km above 750nm and now with 850nm still don't show any sign of weakness. This make me believe that ZF gearboxes are bulletproof but i also follow the advice of my tuner to...

With a normal tune for 350hp, the exhaust and ic it gaves alone a jump of 35hp. Then, after the ecu adjust it allowed more 20hp for a total of 405hp.

No but i will answer to all your questions about my car.

This is definitely a great engine. The stock fuel system it is even capable of more at this power level!!!

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http://www.youtube.com/watch?v=ml0AJmZ-jQI&feature=youtu.be

Just a update to show my latest exhaust version: 3" stainless steel pipe; 3x free flow mufflers (straight perforated pipe inside the muffler with the same size as the exterior pipe), one muffler at...

Just want to share a vid that i made:


http://www.youtube.com/watch?v=KfN3KrBrTLI&feature=player_embedded

Yes you have. There is a UK company that sell complete kits worldwide, bypass pipes and obdII flash device. Check this link:...

Maybe you are very optimistic with the 335i rwhp. There is another vid of that gti and didn't had any chance with a 997.1GT3RS which has 415hp at crank...

The DPF program will be deleted from the ecu. Nowadays, any good ecu programmer have access to that kind of stuff

My car already has dpf-back custom exhaust: two 2,5" pipes till end (no mufflers or resonators).

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My car is the 1st Gen of the 5 Series 35d, so has the cat right after the turbo and a...

I've been following a development of a E90 330d and without the DPF the car lose about 30-40hp. With DPF and tune it makes 300hp. This shows that these cars is so well developed to work with DPF that...

The power numbers seems to be a bit off specially for the BMW, not only by the enviroment speed but also with the climbing of the speed and rpm needle in the audi. My guess is that both are near the...

http://www.youtube.com/watch?v=7hLw56K7aHw&playnext=1&list=PL68669DA37FE05471&index=3

In europe these engines can go up to 350-380hp. It depends how much you want to push to its limit. The first issue will be the gearbox to handle the increased torque. Then, besides the increased heat...