Size of exhaust pipes needed 50 or 57 mm ?
Powerflow EL qouted me R6000 for viper branch , two boxes and 50 mm ss pipes , std pipes are 50 mm so why not go to 57 mm ?
(325i and 328i use same viper branch , no tnt available here !! )
Savspeed quote R65000 for 328i turbo conversion , motor is opened , new pistons etc , power is awsome .
Will car still be used as daily driver , would follow Pedrie's advice if possible .
Mods to N/A motor like higher compression are not suitable for turbo so may not be usefull .