Shorty prochamber doesn't fit???

So I'm finishing up my week-long Mac longtube install and everything's done now... Except the prochamber won't fit!

It seems they made the header end of the prochamber too wide, should I try and bend the pipes closer to eachother?

Does anyone have any other advice for me?

By the way, I have mac l/t's, an o/r prochamber and a mac catback.

Please help!

Thanks

EDIT:
I think I found part of the problem. I bought the L/T's used. The inner (toward transmission) stud on each header seems to be coming out of the flange at an angle pointing towards the center of the car. I don't want to yank too hard on anything related to the header because I don't want to bend the header and make a bad seal up at the gaskets. I don't know if this makes sense so here's a picture.

I'd either have to run open headers or get it towed if I have to bring it to an exhaust shop. Even then, I don't know what they'd be able to do that I can't. The studs themselves are definitely not bent, they're just coming out of the flanges at an angle.

Alright, I bought some grade 8 bolts with washers and locking nuts. I'll try and get the old studs out of the flanges with vice grips and pb blaster tonight. It looks like I'll still have to "encourage" the pipes on the header end of the prochamber to come together about half an inch.

Thanks for your suggestion. Any other help is appreciated as well.