I fitted a drilled airbox to my 1996 NA 1.8 today - then rang Tesco car insurance. Note that I already have a Pipercross panel filter and the IL Motorsports CAT-back stainless exhaust system.
Tesco’s reaction? We won’t insure you! 7 days to revert to standard airbox or policy nul and void.
My reaction? Changing insurer to Flux tomorrow.
Forewarned is forearmed!
FYI - car now sounds…frikking awesome. Keep your heat-soak boy-racer induction kits - drill ya box instead!
LB 
not 100% familar with this airbox mod thing, butr are you saying all you did was drill some holes in it and they now won’t insure you ? That’s mad. Surely they just don’t understand do they…
What does Adrian S Flux say about this??
It’s an old-school alternative to a silly foam cone induction kit and it’s far less invasive engine-wise.
Tesco said yes to sports panel filter - yes to CAT-back exhaust and no to Swiss cheese airbox. So - yup - I swithced to Flux today. Cheaper too!
LB
They said - ‘We don’t care - give us your money, boy.’
try REIS insurance, they quoted me £140 LESS per year 
…With 4 TRACKDAYS