MGBGTV8 exhaust manifold shrouds Pairs of shrouds on offer, part numbers BHH1297 and BHH1298. Posted: 201025 Pairs of the top exhaust manifold shrouds for MGBGTV8s (with one of each, BHH1297 & BHH1298) are available on eBay. The advert says these are the genuine, original parts that were fitted to MGBGTV8s on the production line but have been out of stock since the early 1980s. The advertiser is hob2_68. The advertiser's location is shown as "Cambridge, United Kingdom".