You should use the large clip from Audi, the revised one that is designed not to cut into the hose, havn't got the Audi part number to hand.
I fitted the APR Bi-pipe......
As has bee mentioned before I had to clean up the inside a bit to get rid of the rough casting, but it was not difficult, and the two L shaped silicone hoses are a bit long, they needed a couple of mm cuting off each end of both, otherwise the DVs sit too far back and up.
The c shaped steel brace that goes onto the bottom 2 holes of the throttle body did not fit, it looks to be a different design to the early ones and binds on the underside of the throttle body, needs some filing off to alow the screws to go in easily.
The 2 long allen bolts that fix the pipe through the top of the throttle body are a bit too short to grab all of the thread, about 2 or 3 mm longer on each would be perfect, 90mm bolts with 2 washers were fine for me - I only mention this as I managed to strip part of the thread on one of them! - duh. (I was very careful with the torque) anyway the longer bolts did the trick.
This is because the top right hand thread on the manifold is countersunk by 2mm
The other cock up I made was to damage the throttle body, The existing allen blolts were seized in, I used an impact driver to get the lower right one out (everything else oil etc had failed) thought nothing of it, reassembled everything and the car wouldn't start! - It turns out I shattered the magnets in the motor inside the TB !! - fitted a new throttle body and all is well.
You can fit it by the way without removing the headlight, it's tight but will just go.
So get 2 longer bolts, don't hit the screws to loosen them!, and shorten the l hoses by a couple of mm both ends.
so not at all ideal, but it works well now it's on.
