hey guys, im planing to instal quad exhaust system to my e60 535xi 2008
My thoughts atm:
after 2 OE resonators(catalists)
1 Magnaflow #11385 (not sure 2.5 or 2.25)
2 (1 on each side) Magnaflow #10425
2 Magnaflow #35168 tips
mb just keep OE resonator and add Y for quad exhaust whit Magnaflow #10425 ?
any advice will help!
PS m5 OE bumper on soon!