Vauxhall Astra G Hatchback (98-04) Rear Box Performance ExhaustFits 1. 4 1. 6 1. 8 2. 0 & 2. 2 Petrol models. Cobra Sport performance exhausts enhance the sound, looks and quality of your vehicle giving you the ultimate driving experience. Our sports exhausts range is fully guaranteed to give you assurance of our quality. This Astra performance exhaust is made in 2" 50. 8mm pipework and fit from the centre section backwards replacing the rear section. Please note this will only fit the flange type fitment to the