Quote Originally Posted by FeaRpb View Post
Well that doesn't make be feel too comfortable now.
At least all of the aftermarket TD04 feed lines are this way. I'm not talking about kits with lines and fittings you put together yourself since I haven't seen the inside of every branded -4AN line compared to a stock line but I know on the assembled TD04 kits it's a big issue necking down. You may be fine with your AN fittings just be aware.