these are the exact mods I have installed
- Downpipe
https://www.vr-speed.com/vrsf-3-5-stainless-steel-catless-downpipe-for-f10-f11-f07-535i-xi-f12-f13-640i-e70-e71-x5-x6.html
- Intercooler
https://www.vr-speed.com/vrsf-race-intercooler-fmic-09-16-bmw-535i-640i-740i-f07-f10-f11-f-f07.html
- Blow off Valve
https://www.turnermotorsport.com/p-597194-turbosmart-bov-kompact-em-dual-port-vr9-bmw-n55-e90e92f-series/
- Charge pipe
https://www.vr-speed.com/vrsf-chargepipe-upgrade-kit-07-13-bmw-n55-535i-640i-f10-f11-f12-f13.html
4.5 Cold air intake
https://www.knfilters.com/bmw/535i/3.0l-l6-gas/2011/
- Stage 2 OTS tune
https://www.protuningfreaks.com/collections/bootmod3-menu/products/bootmod3-n55-bmw-235i-335i-435i-535i-x3-x4-x5-m2
AGAIN, DEPENDING ON BRANDS/TIME OF PURCHASE YOU COULD SPEND LESS/MORE THAN I DID. happy modding! ;)