So I recently had my lower suspension arms and drop links replaced due worn components causing the usual banging and knocking noises. First couple weeks great, no noises. Now it appears there is a slight knock when I accelerate in 1st and 2nd from a standstill. I have not noticed any sounds when turning and accelerating. It's going in for exhaust manifold change at the weekend, so I'd like some pointers as to what the cause could be?