N52/N51 FAQ

What is the link for the Aliexpress headers?

https://www.e90post.com/forums/showthread.php?t=2020224

 

Which 22RPD tune should I use? 

If you have a stock car or near stock car, you will need Stage 1

N51-

https://bavautoparts.com/products/22rpd-n51b30-stage-1-tune-1

N52-

https://bavautoparts.com/products/22rpd-n52b30-stage-1-performance-tune

 

If you have any of the following: Headers, MILVS, Any intake manifold other than what came on your car, you will need Stage 2.

N51-

https://bavautoparts.com/products/n51-stage-2-tune

N52-

https://bavautoparts.com/products/22rpd-n52b30-stage-2-tune

 

Should I upgrade my injectors or fuel pump?

You do not need to upgrade your injectors or fuel pump unless you are running E85 or boost.

E85 requires the following injectors plus the Stage 2 tune

https://bavautoparts.com/products/60-bosch-ev14-injector-48-5mm-n52-upgrade

Boost will also require these injectors, and possibly a fuel pump past 400+ whp.

 

How do I install a catch can on my N52?

https://www.youtube.com/watch?v=lod-ZpPX6iU

 

How do I smoke test my N52?

https://www.youtube.com/watch?app=desktop&v=Xc0Owfkztbw

 

How do I make my N52 sound good? 

Without headers:

Muffler delete

135i N54 muffler +  Resonator delete

 

With headers:

3" Exhaust merged at the transmission mount

AA Gen 2 Muffler

 

How do I install a WOTBOX on my N52?

https://www.e90post.com/forums/attachment.php?attachmentid=1668680&d=1501783979