In November last year the previous owner of my T3 bus had the Speedshop stainless steel Exhaust fitted. Because of the lack of space a shortened oil filter was installed, Ryco Z661. On my T3 Doka I have only every had MANN oil filters used... I was wondering if the W712/52 MANN oil filter can be used in place of the Ryco Z661, on my next service... any advice guys? Those who also have the Speedshop exhaust... what oil filter do you guys use?