ok my 88' rx7 n/a is currently insured with a a full exhaust system and an air filter. I Just the stock intake back on because the previous owner had the intake taking in hot air. Anyway, tried putting a quote though auto trader without the air filter.
ill let you guess how much my insurance went down...
(original price is £2k)
ill let you guess how much my insurance went down...
(original price is £2k)

There are 17 year olds paying £2000 to insure Astras and things. They don't have much choice, insurance for young drivers with no NCD is horrifically expensive these days, I feel sorry for them.
) and 3points