It's a 145, but same thing effectively!
I've got a BMC panel filter as well as my modified air intake, I obviously cannot give personal recommendation of that over an induction kit, although the induction kit will make the Boxer engine sound wonderful
I was recommended by a local fella who races Alfas that I should get an induction kit, as it improves the Boxer 145/6 a fair bit. He then said that, when it is fitted, remove all the rubbery, plasticy hoses and boxes which are there now as they hold heat, which ultimately enters the air intake if they aren't removed.
Obviously if you are in the market for increasing the air-flow INto the engine, you will need to improve the air flow OUT as well.
Most people on here recommend Powerflow as a good aftermarket exhaust company, they're pretty much nationwide too http://www.powerflow.uk.com
. Most of the time, a full system from them is less than the full OE system from Alfa, plus it has the added benefit of being Stainless Steel and having a lifetime guarantee (usually for as long as you keep the car).
I cant comment on that, as I am waiting for mine to rust first before I go out and spend money, which I haven't got, on an exhaust!
If we're talking chips, then I would avoid Superchips. There is an alternative however, available from the AO shop http://www.alfaowner.com/store/
at a very good price.
do this one, but it is recommended that super unleaded is always used after fitting. The noticeable difference (from the graphs) is the torque value, and as we all know, it is torque that is the important factor in an engine's performance.
Cant help with the power boost sprays as I have never tried. I do, however add 300ml of Paraffin to my tank every 7 or so fill-ups. The main ingredient in these injector cleaner thingies that you can buy in Halfrauds for about £9 is Paraffin (Kerosene) so I bought a 2 litre tub of it from a garden centre for £5