I couldn't say, I've never ran my td04 with a filter always had mesh over the intake. I would of thought you would be better on power as its a direct intake
Cut up an air filter and use the mesh from around the outside of it and then use a been tin to shape it, then jubilee it on. done mine like that and it sounds EPIC on spool up
This mite help guys http://www.ebay.co.uk/itm/BRAKE-PIPE-3-16-COPPER-X1-25FT-SOFT-20-UNIONS-10-EA-METRIC-MALE-FEMALE-/290664732412?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item43acf7d6fc
Seen this for sale on ebay if anyone is after one its cheap http://www.ebay.co.uk/itm/HDI-Intercooler-Off-toyota-Starlet-/170772260224?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item27c2d1e580
Well I'm running kyb shocks at the minute with 30mm lowering springs i know you can get 50mm springs but I don't know if they would fit my shocks, I'm torn between the meisters in or new lower springs :/