ive bought from nopi before , fuel pump k&N and wires . good price and got through . when you place an order they email you and give you a customer service name and # to call if you have any ? not to much stuff for the e30 but good prices imo for what they have . afm for $103 compared to three hundred every where else . thats why i was looking at spax . the complete set for 310 is not bad but i dont know anything about them anyone has any insite into this setup. are they good or bad ?