Now this isn’t a definite but I love BGW’s & after seeing a E86 with one I’m in too minds. Does anyone know where sell them as I have had a little research online & can’t seem to find any.
While you're at it you should add on a new exhaust as everyone on here knows that the bigger the exhaust then the more BHP you'll get from the engine. Combine that with the extra downforce and you'll have the fastest Z4 on the planet.
Add a new air intake too...
You might want to search for the Turbo thread that's on here as there's a good garage you can use that'll do all the work!