TBH I doubt there will be much difference.
It's the top one I've gone for from Bill
My car is unmapped so perhaps not the best car to test this on.
I have several logs with my BMC CDA on with various other mods.
I'll do some logs with this one and see if there is a difference.
I'm betting that fitting the extension will
help things too as this will straighten the air flow before it goes through the MAF thus allowing us to remove the mesh infront of the MAF and hopefully increasing the g/s.
My car will end up mapped before next summer so will see what I end up with then too.
This Cone should do me for a long time as I won't be at crazy BHP for a long time.
The other reason I bought this was it sounded SO GOOD on my 106 GTI, but it won't sound half as good on my LCR