[wagonmania98]

Hi Guys, just recently got a 22 X6M50. Looking to go with cat-less downpipes and JB4. How reliable would it be for 30-40k miles ? The stock exhaust system is waaaay to quiet coming from a X3M comp. Already have a custom exhaust installed with resonator to make sure sound isn't too much with downpipes.


My biggest concern is how reliable is the JB4 stage 1 ? Anybody run a JB4 for 2 plus years ?

[AlpineG05]

Originally Posted by wagonmania98

Hi Guys, just recently got a 22 X6M50. Looking to go with cat-less downpipes and JB4. How reliable would it be for 30-40k miles ? The stock exhaust system is waaaay to quiet coming from a X3M comp. Already have a custom exhaust installed with resonator to make sure sound isn't too much with downpipes.


My biggest concern is how reliable is the JB4 stage 1 ? Anybody run a JB4 for 2 plus years ?

I ran JB3 on my 335i (n54 motor) for 3 years with catless dps and didn't have any issues other than the normal fuel injectors and fuel pump. These were known weak parts of this motor.

[totalone]

I ran jb4 on Audi s5 b9 for almost 3 years. Didn't had any issues. I would say it is safe to run that.

If you overboost you will get some silent codes that you can pick up from jb4 it self. After about a months you'll know what your car needs.

I would assume you will be using map3 if not mixing on 93 octane.