Mike,Mike Smith wrote:I feel guilty for a blatant plug - BUT
PRS are the only company manufacturing proper Heat Control Valves - I was about to say exactly as the originals, however, we improved them by adding a slightly stronger internal return spring (that helps to give a more positive shut off) and in addition there is a superior Heat Resistant sealing material attached to the flap
The other important point, is that they are fitted with sound deadening material inside (as did the originals)
The cheap ones are just empty cans and therefore all the mechanical engine noise is transmitted into the cabin.
Finally - the cheap ones do not fit without modification
All this is why we manufactured our first set approx. 10 x years ago.
I think that the initial run was 20 pairs - We are into the multiple 100`s now and in addition we manufacture them for B`s - C`s - Pre `A`s and `A` Carrera`s
Apologies for the plug
I ordered those 'cheap' control cans for my 356A before I saw your response and having tried my best to fit them (installation was impossible with incorrect dimensions & pipe angles) I have returned them and ordered replacement PRS units.
I am delighted to say I just bolted the PRS units straight on without issue - nice product and certainly worth the extra cost in terms of unnecessary sweat and stress.
Thx
Martin