[maxcreek1247]

Originally Posted by lnxguy

Maintenance definitely job #1 before you add more power. How many miles are on this car?

90k

[lnxguy]

So trans service, diff service are past due. Do those first along with vac lines, pressure convertors, etc if they haven't been done. Then worry about power adders.

[moz335d]

Originally Posted by maxcreek1247

I just got a 2011 335d, and i want to do a dpf, egr, scr, and swirl flaps delete. i heard from multiple people that it greatly improves reliability and gas mileage. i just honestly have no idea where to start and when I tried researching i just still don’t really understand. I want to find a full exhaust kit to delete dpf and scr, and i think i have a good link to buy swirl flap delete but not one for egr delete. I have a friend who owns a shop and is a master bmw tech so i can do the labor myself i just dont know what to buy and where to start. i dont want to spend too much money (3-3.5 thousand dollars) including a tune. i want to gain a good bit of power but i dont want to sacrifice reliability or too much gas mileage. i was looking at the jr stage 2 race tune but idk what to do to the car to get that tune(it’s bone stock).

swirl flap link i think is decent: https://www.cascadegerman.com/produc...t-335d-x5-35d/

but honestly have no idea what else to buy, please help.
looking to gain maybe 100hp and 100-150 lb ft

I've built about 6 of these so far, the best tune for money is Kassel's stage 2. That will absolutely meet those power goals.

You can do a full delete for anywhere from nearly free to spending $1500 on a downpipe alone.

My suggestion, VSRF DP, Bimmertune EGR Kit, Aliexpress swirl flap delete plates (they come with viton o-rings now), gut SCR, remote flash Kassel Tune. Enjoy.