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					Originally Posted by supraluke  I original tried to bring my car into a couple of quality welding shops. Nobody wanted to see me unless I took the header off the car and hence, need the measurements. 
 My APS header is a V2. My V1 weld's cracked and they replaced it. My V2's weld's cracked, they told me I was no longer under warrenty. V3's cracked as well and V4 got rid of the flex sections completely and had no more problems (that I know of). It's all moot anyways because APS doesn't import to the USA anymore anyways or seem to make parts for Subaru's anymore either.
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 On an aside... virtually all aftermarket headers fail eventually on a car that's run hard.  I remember talking to Mike Warfield at GST about their L time attack car... at the time they had just switched back to stock headers because it was the only thing that could stand up to the punishment.
I ended up doing the same thing.  I sold my Gruppe-S headers and went back to stock, though I did it because the Gruppe-S headers wouldn't clear the Cosworth oil pan I got.  But in the long run, I think the OEM headers are the most reliable, even with that flex joint that will eventually fail.  Grimmspeed does porting/polishing/coating of stock headers that seem to be the best of both worlds: aftermarket performance, stock reliability.  I should have a set as soon as Kspeed gets back to me on a price.