That's pretty cool, the Volvo runs a MAF system. I replaced the factory 2.75" diameter one with a 3" one out of a V6 volvo. It gives more wiggle room with tuning more horsepower. I'm not 100 percent how limited I am with the stock system but most people turning under 12 second 1/4 mile end up going Megasquirt on them. I'm not sure if people have better ability to tune Megasquirt than old Volvo ECUs. Anyway it's working for me so far.

Tomorrow I'll hopefully be pulling the car out of the garage with boost leak fixed and brake fiasco taken care of.