vectra c airbox mod

#3
Alright mate I get more mpg now on longer runs and seems less sluggish around town. Worth doing as it is a free mod and if you don't like it you can just slide it back in.
 

rushy

Senior Member
#10
The general consensus is it doesn't really do much tbh, if anything you can hear the intake more and turbo more on the 2.0T and the CDTi's. Its more of a placebo affect. You'll still notice the air filter gets dirty on one side so the flow is still following the same path.

What does work however is a K&N panel filter. Again I wont say it'll give you any more power as such but it does give a far better throttle response. I never really noticed the K&N until I put a fresh factory one back in and all of a sudden it just felt flat to drive.
 
#12
Done this the other day and my consumption was sitting at 27.5 mpg, it's now at 27.7 with the same journey, distance, speed etc, so it must do something :)

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