Reading through Grub's Magnaflow review thread got me to thinking about some of the Magnaflow Y pipe replacement jobs I've seen done on here.
Yes, the factory Y is crimped pretty bad as well as the pipe under the trans and there is some small benefit to replacing them. However...if you're having your local muffler shop just bend up pipe and not using mandrel bends you really aren't gaining anything. As I stated in his thread...you're just moving the old problem to a new spot.
This thread isn't meant to make anyone mad, or talk down to whoever's pics I used as examples here....it's to hopefully get people to think about the big picture and how to do things the right way instead of the cheap, easy way.
Mandrel bends cost a few bucks...but they're the only way to truly do the job correctly. When you order your MagnaflowY's you can also order the bends to have your local shop fit up the pipe correctly and weld it all up for ya. The job can be done with the Y, 2 45* bends and 2 90* bends....all 4" radius.
If you look at these pics...you can see the muffler shop crimp bends....no better than the OEM stuff.
This one was done using separate mandrel bends and fit to the OEM exhaust.
If you want the most out of your exhaust....spend the extra coin and have it done properly.