hi,ok ive got 17" alloy wheels on the car,they are replica's. They are ET 35 the original audi wheels are ET45 (ive been told) When i fitted my wheels the original bolts were used. Today my friend fitted original wheels and the bolts come out alot further than mine did,although ive never had any problems,is it advisable to get longer bolts? (been on car now for 13 months) (IF SO WHERE AND WHAT TYPE OF BOLTS?) Also is the ET35 ok fittment for my car? (A4 TDI B6 2002) what difference is there between ET35 and ET4 PICTURE OF WHEEL 7.5J X17"