@jason - yeah, i expected it myself. after justifying & spending £1300 on the Xtreme clutch, another £1500 doesnt feel as much as it is.
@dweezle - that's the way i played it. K&N panel = no claimed gain. Remus catback = 9.2hp; +3% on stock. Are they really saying a gearbox *engagement* issue between gears is related to the exhaust mod, or the fact the car cant handle an extra 3% which you'd probably gain on atmospheric conditions between a cool morning and 30c summer heat wave.
i'll probably send the email i sent to dealer today, to HUK tomorrow and go double pronged attack.
plus side, cant fault the dealer really. while i've had issues in the past they've been as you'd hope for when spending £100/h labour - really good. Shame they couldn't get it through warranty but i've a feeling that has very little sway with the dealer.
lets not forget, K&N & Remus were fitted in 2016. First clutch fault was march'17 and yet it was warranty accepted. I've highlighted that to them as well in the email.