bones Posted August 30, 2011 Share Posted August 30, 2011 I would not have thought these boxes could handle 300 to 400 bhp. What is a realistic figure for bhp? http://www.ebay.co.uk/itm/VAUXHALL-OPEL-MANUAL-GETRAG-5-SPEED-ALLOY-GEARBOX-manta-/250878504880?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3a69862fb0#ht_521wt_1048 Quote Link to comment Share on other sites More sharing options...
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